function openPopUp(url, x, y, toolbar, scrollbars, resizable){  
  if(window.popup){
    if(!(popup.closed)){
      popup.close();
	}
    openwin(url, x, y, toolbar, scrollbars, resizable);
  }
  else{
    openwin(url, x, y, toolbar, scrollbars, resizable);
  }
}

function openwin(url, x, y, toolbar, scrollbars, resizable){
  popup = window.open(url,"PopUp","toolbar=" + toolbar + ",location=0,directories=0,status=0,menubar=0,scrollbars=" + scrollbars +",resizable=" + resizable + ",width=" + x + ",height=" + y);
  if (navigator.appName == "Microsoft Internet Explorer"){
    popup.resizeTo((parseInt(x)+10),(parseInt(y)+50));
  }
  else{
    popup.resizeTo(x,y);
  }
  if(navigator.userAgent.indexOf("Mozilla/3.0") != -1  || navigator.userAgent.indexOf("Mozilla/4.0") != -1){
    popup.focus();
  }
}