function KeyDownHandler(btn, event)
{
	if (document.all) {
		if (event.keyCode == 13)
		{
			event.returnValue=false;
			event.cancel = true;
			document.all[btn].click()
		}
	}
	else if (document.getElementById) {
		if (event.which == 13)
		{
			event.returnValue=false;
			event.cancel = true;
			event.preventDefault();
			fireKeyDownButtonEvent(document.getElementById(btn), 'click');
		}
	}
	else if(document.layers) {
		if(event.which == 13)
		{
			event.returnValue=false;
			event.cancel = true;
			document.layers[btn].click()
		}
	}
}

function fireKeyDownButtonEvent(obj, evt) {
    if (document.createEvent) {
        if (obj.href != null && obj.href != '') {
            eval(obj.href);
        }
        else {
            var evObj = document.createEvent('MouseEvents');
            evObj.initEvent(evt, true, false);
            obj.dispatchEvent(evObj);
        }
    } else if (document.createEventObject) {
        obj.fireEvent('on' + evt);
    }
}