// Popup window function
function PopupCenter(pageURL) {
	
var left = (screen.width/2)-(250);
var top = (screen.height/2)-(250);
var targetWin = window.open (pageURL, 'CASE STUDY', 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, copyhistory=no, width=500, height=500, top='+top+', left='+left);

}