我在javascript中读取服务器怎么能够才能读取值

[felix61]

<script language="JScript">
function query(){
location="Offal.Console.aspx?iAssetTypeID="+dic.iAssetTypeID.SelectedValue+"&iAssetClassId="+dic.iAssetClassId.SelectedValue+"";
}
</script>

<TD align="left" height="39">设备类别<asp:dropdownlist class="Smallinput" id="iAssetTypeID" runat="server" Width="126px" AutoPostBack="True"></asp:dropdownlist>
物资类别<asp:dropdownlist class="Smallinput" id="iAssetClassId" name = "iAssetClassId" runat="server" Width="122px"></asp:dropdownlist><asp:imagebutton id="Imagebutton1" runat="server" ImageUrl="/images/search_button.gif"></asp:imagebutton><input type="button" class="DHTMLButtonII" id="sickerquery" onclick="query()" value="查询"></TD>

[welshem]

function query()
{
var lstTyp=document.getElementById("iAssetTypeID");
var lstCls=document.getElementById("iAssetClassId");
location="Offal.Console.aspx?iAssetTypeID="+lstTyp.value+"&iAssetClassId="+lstCls.value;
}