function PopUp(PopUpUrl,thewidth,theheight){ 
var ScreenWidth=window.screen.width; 
var ScreenHeight=window.screen.height; 
var movefromedge=0; 
placementx=((ScreenWidth)-(thewidth))/2; 
placementy=((ScreenHeight)-(theheight+50))/2; 
WinPop=window.open(PopUpUrl,"","width="+thewidth+",height="+theheight+" ,toolbar=0,location=0,directories=0,status=0,scrollbars=1,menubar=0,resizable=0,left="+placementx+",top="+placementy+",screenX="+placementx+",screenY="+placementy+","); 
}