js 设置DropDownList的选中值

页面代码
<asp:DropDownList ID="ddlFolder" runat="server" SkinID="ddlSkin" AutoPostBack="false" OnSelectedIndexChanged="ddlFolder_SelectedIndexChanged">   
<asp:ListItem Value="0">选项0</asp:ListItem>
<asp:ListItem Value="1">选项1</asp:ListItem> 
</asp:DropDownList>

JS代码
document.getElementById("ddlFolder").value="0";//0为你要选中的项的value

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