//this function opens a pop up window with the following dimensions
	//height:500 width 500
	
	function openWindow(myLink, windowName)
	{
	  if(! window.focus)return;
	  var myWin=window.open("",windowName,'height=500,width=500,dependent=yes,resizable=no,scrollbars=yes');
	  myWin.focus();
	  myLink.target=windowName;
	}