document.observe("dom:loaded", function() {
	$('search').
		setStyle({ 
			fontWeight : 'bold' 
		}).
		observe('focus', searchFocusListener).
		observe('blur', searchBlurListener);
});

function searchFocusListener(e)
{
	var element = e.element();
	element.
		setStyle({
			fontWeight : 'normal'
		}).
		clear();
}

function searchBlurListener(e)
{
	var element = e.element();
	if (element.value == '')
	{
		element.
			setStyle({
				fontWeight : 'bold'
			});
		element.value = 'site-wide search';
	}
}