Function.prototype.bind = function(o) {
    var _f = this;
    return function() {
        return _f.apply(o, arguments);
    };
};

$.fn.outer = function() {
    return $('<div></div>').append(this.eq(0).clone()).html();
};

jQuery.extend(
 {
     evalJSON: function(strJson) {
         return eval("(" + strJson + ")");
     },
     toJSON: function(object) {
         var type = typeof object;
         if ('object' == type) {
             if (Array == object.constructor)
                 type = 'array';
             else if (RegExp == object.constructor)
                 type = 'regexp';
             else
                 type = 'object';
         }
         switch (type) {
             case 'undefined':
             case 'unknown':
                 return;
                 break;
             case 'function':
             case 'boolean':
             case 'regexp':
                 return object.toString();
                 break;
             case 'number':
                 return isFinite(object) ? object.toString() : 'null';
                 break;
             case 'string':
                 return '"' + object.replace(/(\\|\")/g, "\\$1").replace(/\n|\r|\t/g,
       function() {
           var a = arguments[0];
           return (a == '\n') ? '\\n' :
                       (a == '\r') ? '\\r' :
                       (a == '\t') ? '\\t' : ""
       }) + '"';
                 break;
             case 'object':
                 if (object === null) return 'null';
                 var results = [];
                 for (var property in object) {
                     if (object[property] != null) {
                         var value = jQuery.toJSON(object[property]);
                         if (value !== undefined) {
                             results.push(jQuery.toJSON(property) + ':' + value);
                         }
                     } else {
                         results.push(property + ':null');
                     }
                 }
                 return '{' + results.join(',') + '}';
                 break;
             case 'array':
                 var results = [];
                 for (var i = 0; i < object.length; i++) {
                     var value = jQuery.toJSON(object[i]);
                     if (value !== undefined) results.push(value);
                 }
                 return '[' + results.join(',') + ']';
                 break;
         }
     }
 });


 $.fieldValue = function(el, successful) {
     var n = el.name, t = el.type, tag = el.tagName.toLowerCase();
     if (typeof successful == 'undefined') successful = true;

     if (successful && (!n || el.disabled || t == 'reset' || t == 'button' ||
        (t == 'checkbox' || t == 'radio') && !el.checked ||
        (t == 'submit' || t == 'image') && el.form && el.form.clk != el ||
        tag == 'select' && el.selectedIndex == -1))
         return null;

     if (tag == 'select') {
         var index = el.selectedIndex;
         if (index < 0) return null;
         var a = [], ops = el.options;
         var one = (t == 'select-one');
         var max = (one ? index + 1 : ops.length);
         for (var i = (one ? index : 0); i < max; i++) {
             var op = ops[i];
             if (op.selected) {
                 var v = op.value;
                 if (!v) 
                     v = (op.attributes && op.attributes['value'] && !(op.attributes['value'].specified)) ? op.text : op.value;
                 if (one) return v;
                 a.push(v);
             }
         }
         return a;
     }
     return el.value;
 };

 $.fn.setFieldValue = function(sValue) {
     return this.each(function() {
         var t = this.type, tag = this.tagName.toLowerCase(),eEl=this;
         switch (t) {
             case 'hidden':
             case 'text':
             case 'file':
             case 'password':
             case 'textarea':
                 this.value = sValue;
                 break;
             case 'checkbox':                 
                 var oReg = new RegExp('(^|,) + eEl.value + (,|$)', 'g');
                 eEl.checked = oReg.test(sValue);
                 break;
             case 'radio':
                 if (eEl.value == sValue)
                     eEl.checked = true;
                 break;
             case 'select-one':          
                 for (var j = 0; j < eEl.options.length; j++) {
                     if (eEl.options[j].value == sValue) {
                         eEl.options[j].selected = true;
                         break;
                     }
                 }
                 break;
         }
     });
 };

 $.fn.clearForm = function() {
     return this.each(function() {
         $('input,select,textarea', this).clearFields();
     });
 };


 $.fn.clearFields = $.fn.clearInputs = function() {
     return this.each(function() {
         var t = this.type, tag = this.tagName.toLowerCase();
         if (t == 'text' || t == 'password' || tag == 'textarea')
             this.value = '';
         else if (t == 'checkbox' || t == 'radio')
             this.checked = false;
         else if (tag == 'select')
             this.selectedIndex = -1;
     });
 };


 $.fn.resetForm = function() {
     return this.each(function() {
         if (typeof this.reset == 'function' || (typeof this.reset == 'object' && !this.reset.nodeType))
             this.reset();
     });
 };


 $.fn.enable = function(b) {
     if (b == undefined) b = true;
     return this.each(function() {
         this.disabled = !b;
     });
 };
 
 $.fn.selected = function(select) {
     if (select == undefined) select = true;
     return this.each(function() {
         var t = this.type;
         if (t == 'checkbox' || t == 'radio')
             this.checked = select;
         else if (this.tagName.toLowerCase() == 'option') {
             var $sel = $(this).parent('select');
             if (select && $sel[0] && $sel[0].type == 'select-one') {
                 $sel.find('option').selected(false);
             }
             this.selected = select;
         }
     });
 };
 
 
 //弹出层
 var TipLoading = {
        id:'I-Loading',
        type:'Loading',
        message:'数据加载中，请稍后...',
        TipShowType:true,
        width:160,
        height:30,
        hasMask:true,
  
    _createHtml:function(){
        var eId = document.getElementById(this.id);
        if(!eId){
             if(this.TipShowType)
             {
                this.width="160";
             }
            var iTxtHeight = this.height - 12;
            if(iTxtHeight < 0) iTxtHeight = 0;

            //创建元素
            var eTipLoading = $('<div style="display:none"></div>').attr({ "class":"I-Loading", "id" : this.id});
            $('body').append(eTipLoading);
            
            var eMask = $('<div></div>')
            .attr({ "class" : "Mask", "id" : this.id + '_Mask'}).css("opacity",0.3);
            eTipLoading.append(eMask);
            
            var eMaskIframe = $('<iframe></iframe>')
            .attr({ "name" : this.id + '_Mask', "id" : this.id + '_Iframe','src':'#'}).css("opacity",0.3);
            eMask.append(eMaskIframe);
            
            
            var eTag = $('<div></div>')
            .attr({ "class" : "Tag", "id" : this.id + '_Tag'}).css("width",this.width.toString()+ 'px');
            eTipLoading.append(eTag);
            
             var eTxt = $('<div></div>')
            .attr("class" , "Txt").css("height",iTxtHeight.toString() + 'px').html(this.message);
            eTag.append(eTxt);

        } 
    },
    
    show:function(){
        this._createHtml();        
        var eTipLoading = document.getElementById(this.id);
        var	eTag = document.getElementById(this.id + '_Tag');
        $(eTipLoading).css('display','block');
        
        var	eMask = document.getElementById(this.id + '_Mask');
        var	eMaskIframe = document.getElementById(this.id + '_Iframe');
        if(this.hasMask){
            $(eMask).css({'width':$(window).width().toString() + 'px','height':$(window).height().toString() + 'px', 'display':'block'});
            $(eMaskIframe).css({'width':$(window).width().toString() + 'px','height':$(window).height().toString() + 'px'});
        }else{
            $(eMask).css({'display':'none'});
        }
        //设置位置
        var iTop;
        var iLeft;
        if(this.TipShowType)
        {
             iTop = ($(window).height() - $(eTag).height()) / 2;
             iLeft = ($(window).width() - $(eTag).width()) / 2;
        }
        else
        {
             iTop = ($(window).height() - $(eTag).height()) / 2;
             
             iLeft = $(window).width()-153;
        }
        $(eTag).css('top',iTop.toString() + 'px');
        $(eTag).css('left',iLeft.toString() + 'px');
        
    },
    hide:function(){
       var eId =  document.getElementById(this.id);
       if(eId!=null){eId.style.display="none";}
    }
};