var ButtonToSubmit = 'masthead_btnSearch';
function SetButtonToSubmit(Button)
{
	ButtonToSubmit = Button;
}

function setFormToPost(e)
{
	var ev = e;
	var IsIE = false;
	if(typeof(event)!='undefined')
	{
		ev = event;
		IsIE = true;
	}
	if(ev)
	{
		if(ev.keyCode == 13)
		{
			var btn = document.getElementById(ButtonToSubmit);
			if(IsIE)
			{
				if(ButtonToSubmit == 'masthead_btnSearch' && document.getElementById('masthead_txtSearch').value == '')
				{
					return false;
				}
				else
				{
					btn.focus();
				}
			}
			else
			{
				btn.click();
			}
		}		
	}
}
document.onkeypress = setFormToPost;