function webcastWindow(url) {
  var subWin = null;
  var ScreenWidth = screen.width;
  if(ScreenWidth < 900){
    subWin=window.open(url,'event','scrollbars=yes,height=500,width=700');
  }else{
    subWin=window.open(url,'event','scrollbars=yes,height=500,width=700');
  }
}