GridView checkbox' all and cancel 'perfectly compatible with IE and Firefox

 
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; 
} 
} 

Add onclick="selectAll(this)" to checkbox of Head to support as many columns as you want.

 
<asp:TemplateField HeaderText="&lt;input id='Checkbox1' type='checkbox' onclick='selectAll(this)' /&gt; The serial number "> 
<ItemTemplate> 
<input id="Checkbox1" type="checkbox" onclick="Get_jdzh(this);" title='<%#Convert.ToString(Eval("cpdm")).Trim() %>' /> 
</ItemTemplate> 
</asp:TemplateField> 

theTable. rows [i] cells [j] getElementsByTagName (' input) [0]; Never use firstChild, otherwise you will make an error under FF.