function SelectAll(tempControl)
{
var theBox=tempControl;
xState=theBox.checked;
elem=theBox.form.elements;
for(i=0;i<elem.length;i++)
if(elem[i].type=='checkbox' && elem[i].id!=theBox.id)
{
if(elem[i].checked!=xState)
elem[i].click();
}
}
调用代码：<asp:CheckBox ID="allCheck" runat="server" onclick="SelectAll(this);" />