placeholder在ie瀏覽器里不顯示的問題解決

<script type="text/javascript">
    if( !('placeholder' in document.createElement('input')) ){

        $('input[placeholder],textarea[placeholder]').each(function(){
            var that = $(this),
                    text= that.attr('placeholder');
            if(that.val()===""){
                that.val(text).addClass('placeholder');
            }
            that.focus(function(){
                if(that.val()===text){
                    that.val("").removeClass('placeholder');
                }
            })
                    .blur(function(){
                        if(that.val()===""){
                            that.val(text).addClass('placeholder');
                        }
                    })
                    .closest('form').submit(function(){
                        if(that.val() === text){
                            that.val('');
                        }
                    });
        });
    }
</script>

在頁面中加入如上的代碼即可顯示文字。