function loadpage(){
 destination = document.forms[0].brand.options[document.forms[0].brand.selectedIndex].value;
 if (destination) location.href = destination
 }
 
 function loadpage2(){
 destination = document.forms[0].feature.options[document.forms[0].feature.selectedIndex].value;
 if (destination) location.href = destination
 }
 
  function loadpage3(){
 destination = document.forms[1].model.options[document.forms[1].model.selectedIndex].value;
 if (destination) location.href = destination
 }
 
 function loadpage4(){
 destination = document.forms[1].type.options[document.forms[1].type.selectedIndex].value;
 if (destination) location.href = destination
 }