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<script language="javascript" type="text/javascript">
function ClientValidate(sender, args)
{
var flag = false;
var list=document.getElementsByTagName("input");
for (var i=0; i<list.length; i++)
{
if(list[i].type=="checkbox")
{
if(list[i].checked==true)
{
flag = true;
}
}
}
if (flag)
{
args.IsValid = true;
}
else
{
args.IsValid = false;
}
}
</script>
<asp:CheckBoxList runat="server" ID="cb" RepeatColumns="6" DataValueField="ID"
DataTextField="Name">
</asp:CheckBoxList>
<asp:CustomValidator ID="CustomValidator1" runat="server" ClientValidationFunction="ClientValidate"
Display="Dynamic" ErrorMessage="请至少选择一项企业类别"></asp:CustomValidator>