(function() {
var q = document.getElementById('search_bar');

 var b = function() {
 if (q.value == '') {
 q.style.background = '#FFFFFF url("/images/search-background.jpg") left no-repeat';
 }
 };

 var f = function() {
 q.style.background = '#ffffff';
 };

 q.onfocus = f;
 q.onblur = b;

})();