I use radajax to my page. When button click everything working fine. But when enter key press raise follwing error
Unhandled exception at line 19979, column 1 in http://localhost:39853/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=RadScriptManager1_TSM&compress=1&_TSM_CombinedScripts_=;;System.Web.Extensions,+Version=4.0.0.0,+Culture=neutral,+PublicKeyToken=31bf3856ad364e35:en-US:4ae4914f-8c8e-4123-9d05-414d87b48357:ea597d4b:b25378d2;Telerik.Web.UI:en-US:42f3bd03-686e-4514-94d4-9dc03944a160:16e4e7cd:f7645509:86526ba7:7c926187:8674cba1:b7778d6c:c08e9f8a:59462f1:a51ee93e:24ee1bba:f46195d3:1e771326:6b3f73b3:78b9daca:7165f74:58366029:2003d0b8:aa288e2d:ed16cbdc0x800a138f -
JavaScript runtime error: Unable to get property 'id' of undefined or null reference