function isWindowOpen(windowhandle){
	if (windowhandle && windowhandle.open && !windowhandle.closed){
		return true;
	} else {
		return false;
	}
}			


var imgWin = new Array();
var count=0;
function openImageWindow(w,h,kv,id)
{
	//var newWindowURL = unescape(url);
	var maxw=0;
	var maxh=0;
	var winsize=0;
	var ratio = w/h;
	var hgt,wid;
	if(w>600 || h>600){
		if(ratio <=1) {
			h = 600;
			w = h*ratio;
		} else {
			w = 600;
			h = w*(1/ratio);
		}
	} 
	
	hgt = 725;
	wid = 692;
		
	var newWindowURL = "prod_image_viewer.php";
	//alert(count);
	imgWin[count] = window.open(newWindowURL,"imgWindow","resizable=yes,address=no,scrollbars=no,height="+hgt+",width="+wid);
	imgWin[count].focus();
	count++;
	//else
	//{
		//imgWin.location = newWindowURL;
		//imgWin.focus();
	//}	
	
}