function submitform(manunull)
  {
    var mark = $("#markler").children('option:selected').val();
    var manu = $("#manuler").children('option:selected').val();
    if( mark != '')
      {
        return true;
      }
    else
      {
        if(manu == manunull)
          {
            $("img.needed").show();  
          }
        else
          {
            $("img.needed:last").show();
          }
        return false;  
      }
    
  } 

 $(document).ready(function() {
    $("#manuler,#markler").change(function(){$("img.needed").hide();});
    
    $("#manuler").change(function(){
        $("#markler").hide();
        $("#loadingbar").css("display","block");
        $("#progressbar").show();
        var value=$(this).children('option:selected').val();
        $("#markler").load("ajax.php",{value: value },function(){ 
        $("#loadingbar").hide();
        $("#markler").show('middle'); });
        
        
      });
     $("div.scrollable").scrollable({circular: true,size: 3 ,speed: 2000,clickable: false}).autoscroll({interval: 3000	});
    });