function validateForm(){              
   if ((document.forms[0].search.value=="enter your SEARCH term...") || (document.forms[0].search.value=="") ) {
      alert("You must enter a search term");
   } else {
      window.location='/search?q=' + escape(document.forms[0].search.value);
   }
}


$(document).ready(function() {  
   $("#search").keydown(function(event) {
         if (event.keyCode == 13) {
            if ((document.forms[0].search.value=="Enter Search Term") || (document.forms[0].search.value=="") ) {
               alert("You must enter a search term");
               return false;
            } else {
               window.location='/search?q=' + escape(document.forms[0].search.value);
               return false;               
            }
         }
    })
});