/**
 * @author uruk
 */
Element.implement({
    toJSON: function(){
        var json = {};
        this.getElements('input, select, textarea', true).each(function(el){
            if (!el.name || el.disabled || el.type == 'submit' || el.type == 'reset' || el.type == 'file') return;
            var value = (el.tagName.toLowerCase() == 'select') ? Element.getSelected(el).map(function(opt){
                return opt.value;
            }) : ((el.type == 'radio' || el.type == 'checkbox') && !el.checked) ? null : el.value;
            $splat(value).each(function(val){
                if (typeof val != 'undefined') {
                    json[el.name] = val;
                }
            });
        });
        return json;
    }
});