select 框 显示/隐藏

 

< script type = " text/javascript " >
function hiddensel(){
  var objForm = document.getElementById( " queryForm " );
  var objLen = objForm.length;
   for (var elcount = 0 ; elcount < objLen; elcount ++ )
  {
     if (objForm.elements[elcount].type == " select-one " )
    {
      objForm.elements[elcount].style.display = " none " ;
    }
  }
}
function showsel(){
  var objForm = document.getElementById( " queryForm " );
  var objLen = objForm.length;
  
   for (var elcount = 0 ; elcount < objLen; elcount ++ )
  {
     if (objForm.elements[elcount].type == " select-one " )
    {
      objForm.elements[elcount].style.display = "" ;
    }
  }
}
</ script >