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function cao() {
if(document.all.ddl_class.value=="0")
{
hongtou.style.display="none";
wailai.style.display="none";
wailai1.style.display="none";
}
else if(document.all.ddl_class.value=="1")
{
hongtou.style.display="block";
wailai.style.display="none";
wailai1.style.display="none";
}
else
{
hongtou.style.display="none";
wailai.style.display="block";
wailai1.style.display="block";
}
}
// --></mce:script>
<asp:DropDownList ID="ddl_class" runat="server" onchange="cao()">
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