<asp:DropDownList ID="DropDownList1" runat="server" onchange="addOption()">
</asp:DropDownList>
<asp:DropDownList ID="DropDownList2" runat="server" onchange="getOption()">
</asp:DropDownList>
function addOption() {
var obj1 = document.getElementById('DropDownList1');
var index = obj1.selectedIndex;
var val = obj1.options[index].value;
var obj = document.getElementById('DropDownList2');
obj.options.length = 0;
for (var i = 1; i < 53; i++) {
obj.options.add(new Option("第" + i + "周", setOptionDate(val, i)));
}
}
function setOptionDate(y, w)
{
return new Date(y, 0, (w - 1) * 7 + 1).toLocaleDateString();
}
function getOption() {
var obj1 = document.getElementById('DropDownList2');
var index = obj1.selectedIndex;
var val = obj1.options[index].value;
alert(val);
}
然后在获取日期那个JS函数里面 给一个HiddenField赋值,后台取出来就行了。