js 动态创建select 并赋予onchange事件

function createSelect(iid,pid,num)//创建select
{
  var mySelect = document.createElement("select"); 
  mySelect.id = iid;  

if(window.addEventListener) // Mozilla, Netscape, Firefox 
{
 mySelect.addEventListener('change', mychange,false); 
}
else// IE 
{ 
 mySelect.attachEvent('onchange',mychange); 
} 
document.getElementById("TypeID").appendChild(mySelect);
}
上面这段可以实现动态创建select 并赋予onchange事件