/*
    Opens a popup window
*/
function OpenPopUpWindow(uri, left, top, width, height) 
{
    if (left == null) left = '50';
    if (top == null) top = '20';
    if (width == null) width = '800';
    if (height == null) height = '600';
    var popupWindow = window.open(uri, "popupWindow", "left="+left+",top="+top+",width="+width+",height="+height+",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no");
	
	if (popupWindow)
		popupWindow.focus();	
	
	return popupWindow;
}