if (document.layers) document.captureEvents(Event.KEYPRESS); // needed if you wish to cancel the key

//document.onkeypress = submitJumpSearch;
//document.myForm.myField.onkeypress = jump;

function enterKeyHandler(e) {
    var Key //literal character code will be stored in this variable
	var key_enter = 13; // 13 = Enter
	try
	{
	if(e && e.which){ //if which property of event object is supported (NN4)
		e = e
		Key = e.which //character code is contained in NN4's which property
		if (Key != 0)
		{
			if (key_enter==Key)
			{
				submitJumpSearch();return false;			
			}
		}
	}
	else {
		e = event
		Key = e.keyCode //character code is contained in IE's keyCode property
		if (Key != 0)
		{
			if (key_enter==Key)
			{
				event.keyCode = 0;
				submitJumpSearch();
				return false;
			}
		}
	}    
	return true;	
	}
	catch(e)
	{
		return true;
	}
}

function submitJumpSearch()
{
	var elem = getElem("Ucheader1_lnkSearchButton") ? getElem("Ucheader1_lnkSearchButton") : getElem("Ucheader_lnkSearchButton");
	try { elem.click(); } catch(e) {return false;}
}