$.fn.onEnter = function(options) 
{
  var opts = $.extend({}, $.fn.onEnter.defaults, options);
  
   $(this).keypress(function (e) {  
            if ((e.which && e.which == 13) || (e.keyCode && e.keyCode == 13)) {  
                     //$('button[type=submit] .default').click();  
                     if (opts.exefunction.length<2)
                     {
                	window.alert('working:)');
                     }
                     else
                     {
                	eval(opts.exefunction);
                     }
          return false;  
         } else {  
        return true;  
     }  
     });  
    
              
              
     };
              
     $.fn.onEnter.defaults = 
     {
        exefunction: ''
     };