$(function(){
  $('#category1').change(function(){
      if ($("#category1").val()>0) {
         location.href='/products/list.php?category_id='+$("#category1").val();
      }
  });
  $('#category2').change(function(){
      if ($("#category2").val()>0) {
         location.href='/products/list.php?category_id='+$("#category2").val();
      }
  });
  $('#category3').change(function(){
      if ($("#category3").val()>0) {
         location.href='/products/list.php?category_id='+$("#category3").val();
      }
  });
  $('#search').click(function(){
      if ($("#category3").val()>0 && $("#name").val() !="") {
         location.href='/products/list.php?category_id='+$("#category3").val()+'&name='+$("#name").val();
      } else if ($("#category2").val()>0) {
         location.href='/products/list.php?category_id='+$("#category2").val()+'&name='+$("#name").val();
      } else if ($("#category1").val()>0) {
         location.href='/products/list.php?category_id='+$("#category1").val()+'&name='+$("#name").val();
      } else {
         location.href='/products/list.php?name='+$("#name").val();
      }
  });
  $('body').bind('keypress',function(e){
	   var code = (e.keyCode ? e.keyCode : e.which);
	   if(code == 13){
		   $('#search').click();
	   } 
	});
});