function PopUp(theURL, winName, features, myWidth, myHeight, isCenter) 
{
  var myLeft = null;
  var myTop = null;
  
  if (features == "")
  {
     features = 'resizable=no, toolbar=no, titlebar=no, status=no, menubar=no'
  }
  if(window.screen)
  {
     if(isCenter.toUpperCase() == 'YES')
     {
	    //var myLeft = (screen.width-myWidth)/2;
        //var myTop = (screen.height-myHeight)/2;
        var myLeft = (screen.availWidth - myWidth)/2;
        var myTop = (screen.availHeight - myHeight)/2;      
        features+=(features!='')?',':'';
        features+='Left='+myLeft+',Top='+myTop;
     }
  }

  var aWind = window.open(theURL, winName, features + ((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
  //var aWind = window.open(theURL, winName, features + ',width='+myWidth+',height='+myHeight);
  aWind.focus();  
}