function selectAll(obj)
{
VAR theTable = obj.parentNode.parentNode.parentNode.parentNode;
var i;
var j = obj.parentNode.cellIndex;
for(i=1;i<theTable.rows.length;
i++)
{
if(theTable.rows[i].cells.length<j) continue;
var objCheckBox = theTable.rows[i].cells[j].
getelementsbytagname('input')[0];
if(objCheckBox.checked!=null)objCheckBox.checked = obj.checked;
}
}
<asp:TemplateField HeaderText="&
amp;lt;input id='Checkbox1' ty
PE='checkbox' onclick='selectAll(this)' />序号">
<
ITemTemplate>
<input id="Checkbox1" type="checkbox" onclick="Get_jdzh(this);" title='<%
#Convert.ToString(Eval("cpdm")).Trim() %>' />
</ItemTemplate>
</asp:TemplateField>