学步园

 function dosave(){
     var strid="";
      for(var i=0;i<frmxx.elements.length; i++)

     {
           var m=frmxx.elements[i];
           var ss=m.name;
           var s=ss.substr(0,2);
            //alert(s);
            if ((m.type=='checkbox') && (m.checked) )
            {
                if(strid==""){
                    strid=m.value;
                }
                else{
                    strid=strid+","+m.value;
                }
            //alert(strid);
            }

        if (strid=="" ){
            ymPrompt.alert('没有选择任何！',250,120,'提示',null)
            return;
        }
  else
  {
      alert(strid);
  }
 }