Comments by Member 7871170 (Top 5 by date)

its not a textbox it is the Text property of the checkbox

i did that: var rdbMerchQ1 = document.getElementById('<%=rdbMerchQ1.ClientID %>');

then if i try rdbMerchQ1[0].checked for instance i get undefined

I have done that and the error occurs here:
$get = $type.getElementById = function DomElement$getElementById(id, element) {
///

Finds an element by id.

/// <param name="id" type="String">The id of the element to find.</param>
/// <param name="element" domElement="true" optional="true" mayBeNull="true"></param>
/// <returns domelement="true" maybenull="true">The element, or null if it was not found.
var e = Function._validateParams(arguments, [
{name: "id", type: String},
{name: "element", mayBeNull: true, domElement: true, optional: true}
]);
if (e) throw e;
return Sys.get("#" + id, element || null);

I have checked this and it is not returning null, it is getting the value of the textbox