function openPop(winName,url,W,H,opt){
  window.name = "par_win";
  if(opt==''){
	  var pop_win=window.open(url,winName,'scrollbars=1,width='+W+',height='+H+'');
  }else{
	  var pop_win=window.open(url,winName,'scrollbars=1,width='+W+',height='+H+','+opt);
  }
  return true;
}