function addListener(element,e,fn){ 
             if(element.addEventListener){ 
            element.addEventListener(e,fn,false); 
             } else { 
             element.attachEvent("on" + e,fn); 
              } 
            } 
            var myinput = document.getElementById("memberCardNum"); 
            addListener(myinput,"click",function(){ 
            	if(myinput.value== "输入会员号查询积分"){
               	 myinput.value = "";
            	}
            }) 
            addListener(myinput,"blur",function(){ 
            	if(myinput.value== ""){
                myinput.value = "输入会员号查询积分"; 
            	}
            })