<select>标签解决只读状态下无法传递值到后台问题

  	function SetReadOnly(id){   
  		var obj=document.getElementById(id)
     	if(obj){   
          	obj.onbeforeactivate = function(){return false;};   
          	obj.onfocus = function(){obj.blur();};   
          	obj.onmouseover = function(){obj.setCapture();};   
          	obj.onmouseout = function(){obj.releaseCapture();};   
      	}   
 	}   
	
	function UnSetReadOnly(id){   
  		var obj=document.getElementById(id)
     	if(obj){   
          	obj.onbeforeactivate = function(){return true;};   
          	obj.onfocus = function(){};   
          	obj.onmouseover = function(){};   
          	obj.onmouseout = function(){};   
      	}   
 	}