function popup(picUrlString, windowWidth, windowHeight)
{	windowWidth-=100;
	var x=(screen.width-windowWidth)/2
	var y=(screen.height-windowHeight)/2
	var featureString = "toolbar=no,scrollbars=yes,resizable=yes "
	featureString += ',left='+x + ',top='+y
	featureString += ',width='+windowWidth+',height='+windowHeight

	popupHandle = window.open(picUrlString ,"popup",featureString)		
	popupHandle.focus();

}
function doNothing(){}