/*
	opens a popup window in the middle of the screen
	without scrolling
*/
function OpenPopUp(file, width, height)
{
   var maxY = screen.availHeight;
   var maxX = screen.availWidth;  
   var x = (maxX - width) / 2;
	var y = (maxY - height) / 2;
    var w = window.open(file,'','status=yes,scrollbars=no,width='+width+',height='+height+',screenX='+x+',screenY='+y+',top='+y+',left='+x);
    if (w != null)
	    w.focus();
}

/*
	opens a popup window in the middle of the screen
	with scrolling
*/
function OpenPopUpScroll(file, width, height)
{
   var maxY = screen.availHeight;
   var maxX = screen.availWidth;  
   var x = (maxX - width) / 2;
	var y = (maxY - height) / 2;
    var w = window.open(file,'','status=yes,scrollbars=yes,width='+width+',height='+height+',screenX='+x+',screenY='+y+',top='+y+',left='+x);
    if (w != null)
	    w.focus();
}