function ddcat() {
     var uni = document.getElementById("ddcat").value; 
     if (uni!=0)
	 {
	//window.location = "index.php?pagename=booksearchresultspro&cat="+uni
		window.location = "http://www.booksyouneed.co.uk/professionalbooks/" + uni + "/"
	 }
   }
   
     function ddcatother() {
     var uni = document.getElementById("ddcat").value; 
     if (uni!=0)
	 {
	//window.location = "index.php?pagename=booksearchresultsother&cat="+uni
		window.location = "http://www.booksyouneed.co.uk/otherbooks/" + uni + "/"
	 }
   }