I tested the jquery over the IE. It is working fine. But, when I run the same pieces of code at Firefox, then it will return an error message to me:

input is null

if (input.d.IsError == true) {

The code are as follow:

$("a[class=edit_link]").click(function () {

var ID = $(this).attr("id");

var dataString = "\\"ID\\":\\"" + ID + "\\""

$.ajax({

type: "POST",

url: "http://DMSDeveloper/eFICPSConverted/testLookupWebMethod.aspx/LoadRecordDetail",

data: "{" + dataString + "}",

contentType: "application/json; charset=utf-8",

dataType: "json",

success: function (input) {

if (input.d.IsError == true) {

alert(input.d.ErrMessage);

}

else {

$("input[type=text][id=txtName]").val(input.d.Name);

$("input[type=text][id=txtContact]").val(input.d.Contact);

$("div[id=TestLookup.aspx.Lookup]").hide();

$("div[id=TestLookup.aspx.Detail]").show();

$("input[type=text][id=txtID]").val(ID);

$("input[type=text][id=txtType]").val("E");

$('label[class=error]').hide();

}

},

error: AjaxFailed

})

});