var maxW,maxH,fromX,fromY,toX,toY,adjX,adjY,zBox,zStep=0,zLink,zNew;
 
function zoomBox(evt,zlink,maxw,maxh,tox,toy)
{
        if (arguments.length > 2)
        {
                zNew=1;
        }
        scrollH = (window.pageYOffset!=null)?window.pageYOffset:document.body.scrollTop;
        maxW = maxw?maxw:window.innerWidth?innerWidth:document.body.clientWidth;
        maxH = maxh?maxh:window.innerHeight?innerHeight:document.body.clientHeight;
        toX = tox?tox:0;
        toY = (toy?toy:0)+scrollH;
        fromX = evt.pageX?evt.pageX:evt.clientX;
        fromY = (evt.pageY?evt.pageY:evt.clientY)+(document.all?scrollH:0);
        adjX = toX+evt.screenX-fromX;
        adjY = toY+evt.screenY-fromY;
 
        if (document.createElement && document.body.appendChild && !zBox)
        {
                zBox=document.createElement("div");
                zBox.style.position = "absolute";
                document.body.appendChild(zBox);
        }
        else if (document.all && !zBox) 
        {
                document.all[document.all.length-1].outerHTML+='<div id="zBoxDiv" style="position:absolute"></div>';
                zBox=document.all.zBoxDiv;
        }
        else if (document.layers && !zBox)
        {
                zBox = new Layer(maxW);
                zBox.style=zBox;
        }
 
        zLink = zlink;
        doZoom();
}
 
function doZoom() {
        zStep+=1;
        zPct=(10-zStep)/10
        if (document.layers)
        {
                zBox.moveTo(toX+zPct*(fromX-toX),toY+zPct*(fromY-toY));
                zBox.document.open();
                zBox.document.write("<table width='"+maxW*(1-zPct)+"' height="+maxH*(1-zPct)+" border=2 cellspacing=0><tr><td></td></tr></table>");
                zBox.document.close();
        }
        else 
        {
                zBox.style.border = "1px solid #d6c9b4"; 
                zBox.style.left = toX+zPct*(fromX-toX);
                zBox.style.top = toY+zPct*(fromY-toY);
                zBox.style.width = maxW*(1-zPct);
                zBox.style.height = maxH*(1-zPct);
        }
 
        zBox.style.visibility = "visible";
        
        if (zStep < 10)
        {
                setTimeout("doZoom("+fromX+","+fromY+","+toX+","+toY+")",30);
        }
        else
        {
                zBox.style.visibility='hidden';
                zStep=0;
                if (zLink && !zNew)
                {
                        location.href=zLink.href;
                }
                else if (zLink && zNew)
                { 
                        var w=window.open(zLink.href,'','width='+maxW+',height='+maxH+',left='+adjX+',top='+adjY+',scrollbars=no');
                        zNew=null;
                }
        }
}