//使用:$("#form1").serialize();

var s = [ ];

function add( key, value ){
    s[ s.length ] = encodeURIComponent(key) + '=' + encodeURIComponent(value);
};

// If an array was passed in, assume that it is an array
// of form elements
if ( jQuery.isArray(a) || a.jquery )
    // Serialize the form elements
    jQuery.each( a, function(){
 add( this.name, this.value );
    });

// Otherwise, assume that it's an object of key/value pairs
else
    // Serialize the key/values
    for ( var j in a )
 // If the value is an array then the key names need to be repeated
 if ( jQuery.isArray(a[j]) )
     jQuery.each( a[j], function(){
  add( j, this );
     });
 else
     add( j, jQuery.isFunction(a[j]) ? a[j]() : a[j] );

// Return the resulting serialization
return s.join("&").replace(/%20/g, "+");
}

return this.map(function(){
    return this.elements ? jQuery.makeArray(this.elements) : this;
})
.filter(function(){
    return this.name && !this.disabled &&
 (this.checked || /select|textarea/i.test(this.nodeName) ||
     /text|hidden|password|search/i.test(this.type));
})
.map(function(i, elem){
    var val = jQuery(this).val();
    return val == null ? null :
 jQuery.isArray(val) ?
     jQuery.map( val, function(val, i){
  return {name: elem.name, value: val};
     }) :
     {name: elem.name, value: val};
    }).get();
}