if (typeof($) != 'undefined') {
	$(document).ready(function(){
		$('#library-catalogue-search input:text').focus(function() {
			if ($(this).val() == 'enter keywords') {
				$(this).attr('value','');
			}
		})
		$('#library-catalogue-search input:text').blur(function() {
			if ($(this).val().replace(/^\s+|\s+$/) == '') {
				$(this).attr('value','enter keywords');
			}
		})
		$('#library-catalogue-search').submit(function() { 
			if ($('#library-catalogue-search input:text').val().replace(/^\s+|\s+$|enter keywords/g,'') == '') { 
				alert('Please enter search keywords.');
				return false;
			}
		})
	})
}