/** 球到西山沟* http://www.cnzj5u.com* 2014/11/26 12:12*/(function ($) {    //判断是否支持placeholder    function isPlaceholer() {        var input = document.createElement("input");        return "placeholder" in input;    }    var placeholderfriend = {        focus: function (s) {            s = $(s).hide().prev().show().focus();        }    }    //不支持的代码    if (!isPlaceholer()) {        $(function () {            var form = $(this);            var elements = form.find("input[placeholder]");            elements.each(function (i) {                var s = $(this);                var pValue = http://www.mamicode.com/s.attr("placeholder");                var sValue =http://www.mamicode.com/ s.val();                if (pValue) {                    if (sValue =http://www.mamicode.com/="") {                        //DOM不支持type的修改，需要复制密码框属性，生成新的DOM                        var html = this.outerHTML || "";                        html = html                            .replace(/\s*type=([‘"])?password\1/gi, " type=\"text\" ")                            .replace(/\s*value=http://www.mamicode.com/([‘"])?\S*\1?/gi, " value=http://www.mamicode.com/"" + pValue + "\" onfocus=\"phfrfocus(this);\" style=\"color:#a9a9a9;\" ");                        s.hide();                        s.after(html);                    }                }            });            elements.blur(function () {                var s = $(this);                var sValue =http://www.mamicode.com/ s.val();                if (sValue =http://www.mamicode.com/="") {                    s.hide().next().show();                }            });        });    }    window.phfrfocus = placeholderfriend.focus;})(jQuery);