var win=null;
 
  function NewWindow(mypage,myname,w,h,scroll,pos){
  self.name = "mainFrame";
  if(pos=="random"){
   LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;
  }
  if(pos=="center"){
   LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;
  } else if((pos!="center" && pos!="random") || pos==null){
   LeftPosition=0;TopPosition=20
  }
  settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=yes';win=window.open(mypage,myname,settings);}