/* This notice must be untouched at all times.

wz_jsgraphics.js    v. 2.3
The latest version is available at
http://www.walterzorn.com
or http://www.devira.com
or http://www.walterzorn.de

Copyright (c) 2002-2004 Walter Zorn. All rights reserved.
Created 3. 11. 2002 by Walter Zorn (Web: http://www.walterzorn.com )
Last modified: 29. 9. 2004

Performance optimizations for Internet Explorer
by Thomas Frank and John Holdsworth.
fillPolygon method implemented by Matthieu Haller.

High Performance JavaScript Graphics Library.
Provides methods
- to draw lines, rectangles, ellipses, polygons
  with specifiable line thickness,
- to fill rectangles and ellipses
- to draw text.
NOTE: Operations, functions and branching have rather been optimized
to efficiency and speed than to shortness of source code.

LICENSE: LGPL

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License (LGPL) as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA,
or see http://www.gnu.org/copyleft/lesser.html
*/


var jg_ihtm, jg_ie, jg_fast, jg_dom, jg_moz,
jg_n4 = (document.layers && typeof document.classes != "undefined");


function chkDHTM(x, i)
{
        x = document.body || null;
        jg_ie = x && typeof x.insertAdjacentHTML != "undefined";
        jg_dom = (x && !jg_ie &&
                typeof x.appendChild != "undefined" &&
                typeof document.createRange != "undefined" &&
                typeof (i = document.createRange()).setStartBefore != "undefined" &&
                typeof i.createContextualFragment != "undefined");
        jg_ihtm = !jg_ie && !jg_dom && x && typeof x.innerHTML != "undefined";
        jg_fast = jg_ie && document.all && !window.opera;
        jg_moz = jg_dom && typeof x.style.MozOpacity != "undefined";
}


function pntDoc()
{
        this.wnd.document.write(jg_fast? this.htmRpc() : this.htm);
        this.htm = '';
}


function pntCnvDom()
{
        var x = document.createRange();
        x.setStartBefore(this.cnv);
        x = x.createContextualFragment(jg_fast? this.htmRpc() : this.htm);
        this.cnv.appendChild(x);
        this.htm = '';
}


function pntCnvIe()
{
        this.cnv.insertAdjacentHTML("BeforeEnd", jg_fast? this.htmRpc() : this.htm);
        this.htm = '';
}


function pntCnvIhtm()
{
        this.cnv.innerHTML += this.htm;
        this.htm = '';
}


function pntCnv()
{
        this.htm = '';
}


function mkDiv(x, y, w, h)
{
        this.htm += '<div style="position:absolute;'+
                'left:' + x + 'px;'+
                'top:' + y + 'px;'+
                'width:' + w + 'px;'+
                'height:' + h + 'px;';
        if (ie) {
        		this.htm += '-opacity:' + cw_opacity + ';' + 
                '-khtml-opacity:' + cw_opacity + ';'+
                'filter: alpha(opacity=' + (cw_opacity * 100) + ');';
        }

//'-moz-opacity:' + window.cw_opacity + ';'+
        this.htm += 
                'clip:rect(0,'+w+'px,'+h+'px,0);'+
                'background-color:' + this.color +
                (!jg_moz? ';overflow:hidden' : '')+
                ';"><\/div>';
}


function mkDivIe(x, y, w, h)
{
        this.htm += '%%'+this.color+';'+x+';'+y+';'+w+';'+h+';';
}


function mkDivPrt(x, y, w, h)
{
        this.htm += '<div style="position:absolute;'+
                'border-left:' + w + 'px solid ' + this.color + ';'+
                'left:' + x + 'px;'+
                'top:' + y + 'px;'+
                'width:0px;'+
                'height:' + h + 'px;'+
                'clip:rect(0,'+w+'px,'+h+'px,0);'+
                'background-color:' + this.color +
                (!jg_moz? ';overflow:hidden' : '')+
                ';"><\/div>';
}


function mkLyr(x, y, w, h)
{
        this.htm += '<layer '+
                'left="' + x + '" '+
                'top="' + y + '" '+
                'width="' + w + '" '+
                'height="' + h + '" '+
                'bgcolor="' + this.color + '"><\/layer>\n';
}


var regex =  /%%([^;]+);([^;]+);([^;]+);([^;]+);([^;]+);/g;
function htmRpc()
{
        return this.htm.replace(
                regex,
                '<div style="overflow:hidden;position:absolute;background-color:'+
                '$1;left:$2;top:$3;width:$4;height:$5"></div>\n');
}


function htmPrtRpc()
{
        return this.htm.replace(
                regex,
                '<div style="overflow:hidden;position:absolute;background-color:'+
                '$1;left:$2;top:$3;width:$4;height:$5;border-left:$4px solid $1"></div>\n');
}


function mkLin(x1, y1, x2, y2)
{
        if (x1 > x2)
        {
                var _x2 = x2;
                var _y2 = y2;
                x2 = x1;
                y2 = y1;
                x1 = _x2;
                y1 = _y2;
        }
        var dx = x2-x1, dy = Math.abs(y2-y1),
        x = x1, y = y1,
        yIncr = (y1 > y2)? -1 : 1;

        if (dx >= dy)
        {
                var pr = dy<<1,
                pru = pr - (dx<<1),
                p = pr-dx,
                ox = x;
                while ((dx--) > 0)
                {
                        ++x;
                        if (p > 0)
                        {
                                this.mkDiv(ox, y, x-ox, 1);
                                y += yIncr;
                                p += pru;
                                ox = x;
                        }
                        else p += pr;
                }
                this.mkDiv(ox, y, x2-ox+1, 1);
        }

        else
        {
                var pr = dx<<1,
                pru = pr - (dy<<1),
                p = pr-dy,
                oy = y;
                if (y2 <= y1)
                {
                        while ((dy--) > 0)
                        {
                                if (p > 0)
                                {
                                        this.mkDiv(x++, y, 1, oy-y+1);
                                        y += yIncr;
                                        p += pru;
                                        oy = y;
                                }
                                else
                                {
                                        y += yIncr;
                                        p += pr;
                                }
                        }
                        this.mkDiv(x2, y2, 1, oy-y2+1);
                }
                else
                {
                        while ((dy--) > 0)
                        {
                                y += yIncr;
                                if (p > 0)
                                {
                                        this.mkDiv(x++, oy, 1, y-oy);
                                        p += pru;
                                        oy = y;
                                }
                                else p += pr;
                        }
                        this.mkDiv(x2, oy, 1, y2-oy+1);
                }
        }
}


function mkLin2D(x1, y1, x2, y2)
{
        if (x1 > x2)
        {
                var _x2 = x2;
                var _y2 = y2;
                x2 = x1;
                y2 = y1;
                x1 = _x2;
                y1 = _y2;
        }
        var dx = x2-x1, dy = Math.abs(y2-y1),
        x = x1, y = y1,
        yIncr = (y1 > y2)? -1 : 1;

        var s = this.stroke;
        if (dx >= dy)
        {
                if (s-3 > 0)
                {
                        var _s = (s*dx*Math.sqrt(1+dy*dy/(dx*dx))-dx-(s>>1)*dy) / dx;
                        _s = (!(s-4)? Math.ceil(_s) : Math.round(_s)) + 1;
                }
                else var _s = s;
                var ad = Math.ceil(s/2);

                var pr = dy<<1,
                pru = pr - (dx<<1),
                p = pr-dx,
                ox = x;
                while ((dx--) > 0)
                {
                        ++x;
                        if (p > 0)
                        {
                                this.mkDiv(ox, y, x-ox+ad, _s);
                                y += yIncr;
                                p += pru;
                                ox = x;
                        }
                        else p += pr;
                }
                this.mkDiv(ox, y, x2-ox+ad+1, _s);
        }

        else
        {
                if (s-3 > 0)
                {
                        var _s = (s*dy*Math.sqrt(1+dx*dx/(dy*dy))-(s>>1)*dx-dy) / dy;
                        _s = (!(s-4)? Math.ceil(_s) : Math.round(_s)) + 1;
                }
                else var _s = s;
                var ad = Math.round(s/2);

                var pr = dx<<1,
                pru = pr - (dy<<1),
                p = pr-dy,
                oy = y;
                if (y2 <= y1)
                {
                        ++ad;
                        while ((dy--) > 0)
                        {
                                if (p > 0)
                                {
                                        this.mkDiv(x++, y, _s, oy-y+ad);
                                        y += yIncr;
                                        p += pru;
                                        oy = y;
                                }
                                else
                                {
                                        y += yIncr;
                                        p += pr;
                                }
                        }
                        this.mkDiv(x2, y2, _s, oy-y2+ad);
                }
                else
                {
                        while ((dy--) > 0)
                        {
                                y += yIncr;
                                if (p > 0)
                                {
                                        this.mkDiv(x++, oy, _s, y-oy+ad);
                                        p += pru;
                                        oy = y;
                                }
                                else p += pr;
                        }
                        this.mkDiv(x2, oy, _s, y2-oy+ad+1);
                }
        }
}


function mkLinDott(x1, y1, x2, y2)
{
        if (x1 > x2)
        {
                var _x2 = x2;
                var _y2 = y2;
                x2 = x1;
                y2 = y1;
                x1 = _x2;
                y1 = _y2;
        }
        var dx = x2-x1, dy = Math.abs(y2-y1),
        x = x1, y = y1,
        yIncr = (y1 > y2)? -1 : 1,
        drw = true;
        if (dx >= dy)
        {
                var pr = dy<<1,
                pru = pr - (dx<<1),
                p = pr-dx;
                while ((dx--) > 0)
                {
                        if (drw) this.mkDiv(x, y, 1, 1);
                        drw = !drw;
                        if (p > 0)
                        {
                                y += yIncr;
                                p += pru;
                        }
                        else p += pr;
                        ++x;
                }
                if (drw) this.mkDiv(x, y, 1, 1);
        }

        else
        {
                var pr = dx<<1,
                pru = pr - (dy<<1),
                p = pr-dy;
                while ((dy--) > 0)
                {
                        if (drw) this.mkDiv(x, y, 1, 1);
                        drw = !drw;
                        y += yIncr;
                        if (p > 0)
                        {
                                ++x;
                                p += pru;
                        }
                        else p += pr;
                }
                if (drw) this.mkDiv(x, y, 1, 1);
        }
}


function mkOv(left, top, width, height)
{
        var a = width>>1, b = height>>1,
        wod = width&1, hod = (height&1)+1,
        cx = left+a, cy = top+b,
        x = 0, y = b,
        ox = 0, oy = b,
        aa = (a*a)<<1, bb = (b*b)<<1,
        st = (aa>>1)*(1-(b<<1)) + bb,
        tt = (bb>>1) - aa*((b<<1)-1),
        w, h;
        while (y > 0)
        {
                if (st < 0)
                {
                        st += bb*((x<<1)+3);
                        tt += (bb<<1)*(++x);
                }
                else if (tt < 0)
                {
                        st += bb*((x<<1)+3) - (aa<<1)*(y-1);
                        tt += (bb<<1)*(++x) - aa*(((y--)<<1)-3);
                        w = x-ox;
                        h = oy-y;
                        if (w&2 && h&2)
                        {
                                this.mkOvQds(cx, cy, -x+2, ox+wod, -oy, oy-1+hod, 1, 1);
                                this.mkOvQds(cx, cy, -x+1, x-1+wod, -y-1, y+hod, 1, 1);
                        }
                        else this.mkOvQds(cx, cy, -x+1, ox+wod, -oy, oy-h+hod, w, h);
                        ox = x;
                        oy = y;
                }
                else
                {
                        tt -= aa*((y<<1)-3);
                        st -= (aa<<1)*(--y);
                }
        }
        this.mkDiv(cx-a, cy-oy, a-ox+1, (oy<<1)+hod);
        this.mkDiv(cx+ox+wod, cy-oy, a-ox+1, (oy<<1)+hod);
}


function mkOv2D(left, top, width, height)
{
        var s = this.stroke;
        width += s-1;
        height += s-1;
        var a = width>>1, b = height>>1,
        wod = width&1, hod = (height&1)+1,
        cx = left+a, cy = top+b,
        x = 0, y = b,
        aa = (a*a)<<1, bb = (b*b)<<1,
        st = (aa>>1)*(1-(b<<1)) + bb,
        tt = (bb>>1) - aa*((b<<1)-1);

        if (s-4 < 0 && (!(s-2) || width-51 > 0 && height-51 > 0))
        {
                var ox = 0, oy = b,
                w, h,
                pxl, pxr, pxt, pxb, pxw;
                while (y > 0)
                {
                        if (st < 0)
                        {
                                st += bb*((x<<1)+3);
                                tt += (bb<<1)*(++x);
                        }
                        else if (tt < 0)
                        {
                                st += bb*((x<<1)+3) - (aa<<1)*(y-1);
                                tt += (bb<<1)*(++x) - aa*(((y--)<<1)-3);
                                w = x-ox;
                                h = oy-y;

                                if (w-1)
                                {
                                        pxw = w+1+(s&1);
                                        h = s;
                                }
                                else if (h-1)
                                {
                                        pxw = s;
                                        h += 1+(s&1);
                                }
                                else pxw = h = s;
                                this.mkOvQds(cx, cy, -x+1, ox-pxw+w+wod, -oy, -h+oy+hod, pxw, h);
                                ox = x;
                                oy = y;
                        }
                        else
                        {
                                tt -= aa*((y<<1)-3);
                                st -= (aa<<1)*(--y);
                        }
                }
                this.mkDiv(cx-a, cy-oy, s, (oy<<1)+hod);
                this.mkDiv(cx+a+wod-s+1, cy-oy, s, (oy<<1)+hod);
        }

        else
        {
                var _a = (width-((s-1)<<1))>>1,
                _b = (height-((s-1)<<1))>>1,
                _x = 0, _y = _b,
                _aa = (_a*_a)<<1, _bb = (_b*_b)<<1,
                _st = (_aa>>1)*(1-(_b<<1)) + _bb,
                _tt = (_bb>>1) - _aa*((_b<<1)-1),

                pxl = new Array(),
                pxt = new Array(),
                _pxb = new Array();
                pxl[0] = 0;
                pxt[0] = b;
                _pxb[0] = _b-1;
                while (y > 0)
                {
                        if (st < 0)
                        {
                                st += bb*((x<<1)+3);
                                tt += (bb<<1)*(++x);
                                pxl[pxl.length] = x;
                                pxt[pxt.length] = y;
                        }
                        else if (tt < 0)
                        {
                                st += bb*((x<<1)+3) - (aa<<1)*(y-1);
                                tt += (bb<<1)*(++x) - aa*(((y--)<<1)-3);
                                pxl[pxl.length] = x;
                                pxt[pxt.length] = y;
                        }
                        else
                        {
                                tt -= aa*((y<<1)-3);
                                st -= (aa<<1)*(--y);
                        }

                        if (_y > 0)
                        {
                                if (_st < 0)
                                {
                                        _st += _bb*((_x<<1)+3);
                                        _tt += (_bb<<1)*(++_x);
                                        _pxb[_pxb.length] = _y-1;
                                }
                                else if (_tt < 0)
                                {
                                        _st += _bb*((_x<<1)+3) - (_aa<<1)*(_y-1);
                                        _tt += (_bb<<1)*(++_x) - _aa*(((_y--)<<1)-3);
                                        _pxb[_pxb.length] = _y-1;
                                }
                                else
                                {
                                        _tt -= _aa*((_y<<1)-3);
                                        _st -= (_aa<<1)*(--_y);
                                        _pxb[_pxb.length-1]--;
                                }
                        }
                }

                var ox = 0, oy = b,
                _oy = _pxb[0],
                l = pxl.length,
                w, h;
                for (var i = 0; i < l; i++)
                {
                        if (typeof _pxb[i] != "undefined")
                        {
                                if (_pxb[i] < _oy || pxt[i] < oy)
                                {
                                        x = pxl[i];
                                        this.mkOvQds(cx, cy, -x+1, ox+wod, -oy, _oy+hod, x-ox, oy-_oy);
                                        ox = x;
                                        oy = pxt[i];
                                        _oy = _pxb[i];
                                }
                        }
                        else
                        {
                                x = pxl[i];
                                this.mkDiv(cx-x+1, cy-oy, 1, (oy<<1)+hod);
                                this.mkDiv(cx+ox+wod, cy-oy, 1, (oy<<1)+hod);
                                ox = x;
                                oy = pxt[i];
                        }
                }
                this.mkDiv(cx-a, cy-oy, 1, (oy<<1)+hod);
                this.mkDiv(cx+ox+wod, cy-oy, 1, (oy<<1)+hod);
        }
}


function mkOvDott(left, top, width, height)
{
        var a = width>>1, b = height>>1,
        wod = width&1, hod = height&1,
        cx = left+a, cy = top+b,
        x = 0, y = b,
        aa2 = (a*a)<<1, aa4 = aa2<<1, bb = (b*b)<<1,
        st = (aa2>>1)*(1-(b<<1)) + bb,
        tt = (bb>>1) - aa2*((b<<1)-1),
        drw = true;
        while (y > 0)
        {
                if (st < 0)
                {
                        st += bb*((x<<1)+3);
                        tt += (bb<<1)*(++x);
                }
                else if (tt < 0)
                {
                        st += bb*((x<<1)+3) - aa4*(y-1);
                        tt += (bb<<1)*(++x) - aa2*(((y--)<<1)-3);
                }
                else
                {
                        tt -= aa2*((y<<1)-3);
                        st -= aa4*(--y);
                }
                if (drw) this.mkOvQds(cx, cy, -x, x+wod, -y, y+hod, 1, 1);
                drw = !drw;
        }
}


function mkRect(x, y, w, h)
{
        var s = this.stroke;
        this.mkDiv(x, y, w, s);
        this.mkDiv(x+w, y, s, h);
        this.mkDiv(x, y+h, w+s, s);
        this.mkDiv(x, y+s, s, h-s);
}


function mkRectDott(x, y, w, h)
{
        this.drawLine(x, y, x+w, y);
        this.drawLine(x+w, y, x+w, y+h);
        this.drawLine(x, y+h, x+w, y+h);
        this.drawLine(x, y, x, y+h);
}


function jsgFont()
{
        this.PLAIN = 'font-weight:normal;';
        this.BOLD = 'font-weight:bold;';
        this.ITALIC = 'font-style:italic;';
        this.ITALIC_BOLD = this.ITALIC + this.BOLD;
        this.BOLD_ITALIC = this.ITALIC_BOLD;
}
var Font = new jsgFont();


function jsgStroke()
{
        this.DOTTED = -1;
}
var Stroke = new jsgStroke();


function jsGraphics(id, wnd)
{
        this.setColor = new Function('arg', 'this.color = arg.toLowerCase();');

        this.setStroke = function(x)
        {
                this.stroke = x;
                if (!(x+1))
                {
                        this.drawLine = mkLinDott;
                        this.mkOv = mkOvDott;
                        this.drawRect = mkRectDott;
                }
                else if (x-1 > 0)
                {
                        this.drawLine = mkLin2D;
                        this.mkOv = mkOv2D;
                        this.drawRect = mkRect;
                }
                else
                {
                        this.drawLine = mkLin;
                        this.mkOv = mkOv;
                        this.drawRect = mkRect;
                }
        };


        this.setPrintable = function(arg)
        {
                this.printable = arg;
                if (jg_fast)
                {
                        this.mkDiv = mkDivIe;
                        this.htmRpc = arg? htmPrtRpc : htmRpc;
                }
                else this.mkDiv = jg_n4? mkLyr : arg? mkDivPrt : mkDiv;
        };


        this.setFont = function(fam, sz, sty)
        {
                this.ftFam = fam;
                this.ftSz = sz;
                this.ftSty = sty || Font.PLAIN;
        };


        this.drawPolyline = this.drawPolyLine = function(x, y, s)
        {
                for (var i=0 ; i<x.length-1 ; i++ )
                        this.drawLine(x[i], y[i], x[i+1], y[i+1]);
        };


        this.fillRect = function(x, y, w, h)
        {
                this.mkDiv(x, y, w, h);
        };


        this.drawPolygon = function(x, y)
        {
                this.drawPolyline(x, y);
                this.drawLine(x[x.length-1], y[x.length-1], x[0], y[0]);
        };


        this.drawEllipse = this.drawOval = function(x, y, w, h)
        {
                this.mkOv(x, y, w, h);
        };


        this.fillEllipse = this.fillOval = function(left, top, w, h)
        {
                var a = (w -= 1)>>1, b = (h -= 1)>>1,
                wod = (w&1)+1, hod = (h&1)+1,
                cx = left+a, cy = top+b,
                x = 0, y = b,
                ox = 0, oy = b,
                aa2 = (a*a)<<1, aa4 = aa2<<1, bb = (b*b)<<1,
                st = (aa2>>1)*(1-(b<<1)) + bb,
                tt = (bb>>1) - aa2*((b<<1)-1),
                pxl, dw, dh;
                if (w+1) while (y > 0)
                {
                        if (st < 0)
                        {
                                st += bb*((x<<1)+3);
                                tt += (bb<<1)*(++x);
                        }
                        else if (tt < 0)
                        {
                                st += bb*((x<<1)+3) - aa4*(y-1);
                                pxl = cx-x;
                                dw = (x<<1)+wod;
                                tt += (bb<<1)*(++x) - aa2*(((y--)<<1)-3);
                                dh = oy-y;
                                this.mkDiv(pxl, cy-oy, dw, dh);
                                this.mkDiv(pxl, cy+oy-dh+hod, dw, dh);
                                ox = x;
                                oy = y;
                        }
                        else
                        {
                                tt -= aa2*((y<<1)-3);
                                st -= aa4*(--y);
                        }
                }
                this.mkDiv(cx-a, cy-oy, w+1, (oy<<1)+hod);
        };



/* fillPolygon method, implemented by Matthieu Haller.
This javascript function is an adaptation of the gdImageFilledPolygon for Walter Zorn lib.
C source of GD 1.8.4 found at http://www.boutell.com/gd/

THANKS to Kirsten Schulz for the polygon fixes!

The intersection finding technique of this code could be improved
by remembering the previous intertersection, and by using the slope.
That could help to adjust intersections to produce a nice
interior_extrema. */
        this.fillPolygon = function(array_x, array_y)
        {
                var i;
                var y;
                var miny, maxy;
                var x1, y1;
                var x2, y2;
                var ind1, ind2;
                var ints;

                var n = array_x.length;

                if (!n) return;


                miny = array_y[0];
                maxy = array_y[0];
                for (i = 1; i < n; i++)
                {
                        if (array_y[i] < miny)
                                miny = array_y[i];

                        if (array_y[i] > maxy)
                                maxy = array_y[i];
                }
                for (y = miny; y <= maxy; y++)
                {
                        var polyInts = new Array();
                        ints = 0;
                        for (i = 0; i < n; i++)
                        {
                                if (!i)
                                {
                                        ind1 = n-1;
                                        ind2 = 0;
                                }
                                else
                                {
                                        ind1 = i-1;
                                        ind2 = i;
                                }
                                y1 = array_y[ind1];
                                y2 = array_y[ind2];
                                if (y1 < y2)
                                {
                                        x1 = array_x[ind1];
                                        x2 = array_x[ind2];
                                }
                                else if (y1 > y2)
                                {
                                        y2 = array_y[ind1];
                                        y1 = array_y[ind2];
                                        x2 = array_x[ind1];
                                        x1 = array_x[ind2];
                                }
                                else continue;

                                 // modified 11. 2. 2004 Walter Zorn
                                if ((y >= y1) && (y < y2))
                                        polyInts[ints++] = Math.round((y-y1) * (x2-x1) / (y2-y1) + x1);

                                else if ((y == maxy) && (y > y1) && (y <= y2))
                                        polyInts[ints++] = Math.round((y-y1) * (x2-x1) / (y2-y1) + x1);
                        }
                        polyInts.sort(integer_compare);
                        for (i = 0; i < ints; i+=2)
                                this.mkDiv(polyInts[i], y, polyInts[i+1]-polyInts[i]+1, 1);
                }
        };


        this.drawString = function(txt, x, y)
        {
                this.htm += '<div style="position:absolute;white-space:nowrap;'+
                        'left:' + x + 'px;'+
                        'top:' + y + 'px;'+
                        'font-family:' +  this.ftFam + ';'+
                        'font-size:' + this.ftSz + ';'+
                        'color:' + this.color + ';' + this.ftSty + '">'+
                        txt +
                        '<\/div>';
        }


        this.drawImage = function(imgSrc, x, y, w, h)
        {
                this.htm += '<div style="position:absolute;'+
                        'left:' + x + 'px;'+
                        'top:' + y + 'px;'+
                        'width:' +  w + ';'+
                        'height:' + h + ';">'+
                        '<img src="' + imgSrc + '" width="' + w + '" height="' + h + '">'+
                        '<\/div>';
        }


        this.clear = function()
        {
                this.htm = "";
                if (this.cnv) this.cnv.innerHTML = this.defhtm;
        };


        this.mkOvQds = function(cx, cy, xl, xr, yt, yb, w, h)
        {
                this.mkDiv(xr+cx, yt+cy, w, h);
                this.mkDiv(xr+cx, yb+cy, w, h);
                this.mkDiv(xl+cx, yb+cy, w, h);
                this.mkDiv(xl+cx, yt+cy, w, h);
        };

        this.setStroke(1);
        this.setFont('verdana,geneva,helvetica,sans-serif', String.fromCharCode(0x31, 0x32, 0x70, 0x78), Font.PLAIN);
        this.color = '#000000';
        this.htm = '';
        this.wnd = wnd || window;

        if (!(jg_ie || jg_dom || jg_ihtm)) chkDHTM();
        if (typeof id != 'string' || !id) this.paint = pntDoc;
        else
        {
                this.cnv = document.all? (this.wnd.document.all[id] || null)
                        : document.getElementById? (this.wnd.document.getElementById(id) || null)
                        : null;
                this.defhtm = (this.cnv && this.cnv.innerHTML)? this.cnv.innerHTML : '';
                this.paint = jg_dom? pntCnvDom : jg_ie? pntCnvIe : jg_ihtm? pntCnvIhtm : pntCnv;
        }

        this.setPrintable(false);
}



function integer_compare(x,y)
{
        return (x < y) ? -1 : ((x > y)*1);
}