$('.valuefield').each(function() {
   var elem = $(this);

   // Save current value of element
   elem.data('oldVal', elem.val());

   // Look for changes in the value
   elem.bind("propertychange change click keyup input paste", function(event){
      // If value has changed...
      console.log('value changed');
      needcheck = 1;
      if (elem.data('oldVal') != elem.val()) {
       // Updated stored value
       elem.data('oldVal', elem.val());

       // Do action
     }
   });
 });