<script src="assets/js/jquery-1.9.1.min.js"></script>

<script>

    /*

     * jQuery placeholder, fix for IE6,7,8,9

     * @author JENA

     * @since 20131115.1504

     * @website ishere.cn

     */

    var JPlaceHolder = {

        //检测

        _check : function(){

            return 'placeholder' in document.createElement('input');

        },

        //初始化

        init : function(){

            if(!this._check()){

                this.fix();

            }

        },

        //修复

        fix : function(){

            jQuery(':input[placeholder]').each(function(index, element) {

                var self = $(this), txt = self.attr('placeholder');

                self.wrap($('<div></div>').css({position:'relative', zoom:'1', border:'none', background:'none', padding:'none', margin:'none'}));

                var pos = self.position(), h = self.outerHeight(true), paddingleft = self.css('padding-left');

                var holder = $('<span></span>').text(txt).css({position:'absolute', left:pos.left+10, top:pos.top+8, height:h, lienHeight:h, paddingLeft:paddingleft, color:'#aaa'}).appendTo(self.parent());

                self.focusin(function(e) {

                    holder.hide();

                }).focusout(function(e) {

                    if(!self.val()){

                        holder.show();

                    }

                });

                holder.click(function(e) {

                    holder.hide();

                    self.focus();

                });

            });

        }

    };

    //执行

    jQuery(function(){

        JPlaceHolder.init();

    });

</script>