var imgwin

function viewimage(imgname,xsize,ysize, imgdesc)
{
	
	if (imgname != "")
	{
		if (imgwin != null) {imgwin.close();}
		//if (window.name == 'image') {image.close;}
		//if (image && !image.closed) {image.close}
		xsize=eval(xsize)+40
		ysize = eval(ysize)+30
		imgwin = window.open("viewimage.asp?imgname="+imgname+"&imgdesc="+imgdesc+"", 'image', 'height='+ysize+' width='+xsize+',scrollbars=yes,status=no,toolbar=no,left=50,top=50');
	}
}