function searchcourses(criteria) {
   document.getElementById("continue_"+criteria).disabled=true;
   var data = document.getElementById(criteria).value;
   var url = "portfolio-results.php?"+criteria+"=" + escape(data); 
   document.getElementById("continue_"+criteria).disabled=false;  
   window.location = url;                        
} 

function keywordsearch(criteria) {
   document.getElementById("continue_"+criteria).disabled=true;
   var data = document.getElementById(criteria).value;
   var url = "search-results.php?"+criteria+"=" + escape(data); 
   document.getElementById("continue_"+criteria).disabled=false;  
   window.location = url;                        
}