How To solve microsoft Jscript runtime error:method name is undefined

         How To solve microsoft Jscript runtime error:method name is undefined:

        When We use javascript in our page most of times this error Will come,so this Problem will

       Resolved by using this Code in JavaScript-

function openWindow() {

var oWnd = window.radopen(null, "RadWindow1");

oWnd.SetUrl(oWnd.GetUrl());

}

now this code will work..