getWorkArea() Function in the Form API Not workin

System

Teamsite Version 6.1 on Windows Service pack SP2

function init()
{
alert("In the Init Function");
var area = IWDatacapture.getWorkarea();

alert("The Area is " + area);


// callServer("http:\/\/lnao92\/iw-bin\/validateSingleDCR", parameters, true );
// alert("After the Call Server ");
}


IWEventRegistry.addFormHandler("onFormInit", init);

In the above case getWorkarea() is not working. It is just dying.