Question

如何在JS里设置服务器控件DropDownList的值.急!!!!!!!!!!!!!

var second = document.getElementById("ProductSecondClass");
second.options.add(new Option("请选择",0));
这样有错么

Answer 1

前提是ProductSecondClass在
<select id="ProductSecondClass">
中

Answer 2

var ddlID = document.getElementById("ProductSecondClass")
var index = ddl.selectedIndex;
ddlID.options[index].add(new Option("请选择",0));

//ddlID.options[index].value;
//ddlID.options[index].text;