$(document).ready(function(){
    var btnUpload=$('#upload');  
    var status=$('#status');  
    var cnt=1;
            new AjaxUpload(btnUpload, {  
              action: '/upload/upload.inc.php',  
             //Name of the file input box  
              name: 'uploadfile',  
              data: ({
                 docnum : cnt
              }),
              onSubmit: function(file, ext){  
              if (! (ext && /^(jpg|png|jpeg|gif)$/.test(ext))){  
                     // check for valid file extension  
                   status.text('Only JPG, PNG or GIF files are allowed');  
                   return false;  
              }
              if(cnt > 20) {
      					status.text('Your can upload 20 files per session only');
			      		return false;
				      }
  
              status.text('Uploading...');  
         },  
          onComplete: function(file, response){ 
             //On completion clear the status  
              status.text('');  
              
               isMatch = response.search('error'); 
               //Add uploaded file to list  
              if(isMatch != -1){ 
                $('<li></li>').appendTo('#files').text('error').addClass('error');                                    
              } else { 
                $('<li></li>').appendTo('#files').html('File uploaded successfully.&rarr;'+file).addClass('success');                   
              }
              cnt++; 
            }
            
       }); 
 });