var maxW,maxH,fromX,fromY,toX,toY,adjX,adjY,zBox2,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 && !zBox2) {
	zBox2=document.createElement("div");
	zBox2.style.position="absolute";
	document.body.appendChild(zBox2);
} else if (document.all && !zBox2) {
	document.all[document.all.length-1].outerHTML+='<div id="zBox2Div" style="position:absolute"></div>';
	zBox2=document.all.zBox2Div;
} else if (document.layers && !zBox2) {
	zBox2=new Layer(maxW);
	zBox2.style=zBox2;
	}
zLink=zlink;
doZoom();
}

function doZoom() {
zStep+=1;
zPct=(10-zStep)/10
if (document.layers) {
	zBox2.moveTo(toX+zPct*(fromX-toX),toY+zPct*(fromY-toY));
	zBox2.document.open();
	zBox2.document.write("<table width='"+maxW*(1-zPct)+"' height="+maxH*(1-zPct)+" border=2 cellspacing=0><tr><td></td></tr></table>");
	zBox2.document.close();
	} else {
	zBox2.style.border="2px solid #999999";
	zBox2.style.left=toX+zPct*(fromX-toX);
	zBox2.style.top=toY+zPct*(fromY-toY);
	zBox2.style.width=maxW*(1-zPct);
	zBox2.style.height=maxH*(1-zPct);
	}
zBox2.style.visibility="visible";
if (zStep < 10) setTimeout("doZoom("+fromX+","+fromY+","+toX+","+toY+")",30);
else {
	zBox2.style.visibility='hidden';
	zStep=0;
	if (zLink && !zNew) location.href=zLink.href;
	else if (zLink && zNew) {
		var w=window.open('imagepreview.aspx?image='+zLink.href,'viale44','width='+maxW+',height='+maxH+',left='+adjX+',top='+adjY+'');
		zNew=null;
		}
	}
}