placeholder is not working in IE9

Question

I am salesforce (SFDC) developer. In my visualforce page for input box I am using placeholder code.

Answer 1

if(navigator.appVersion.match(/MSIE [\d.]+/)){
    $(document).find("input[placeholder]").each(function(){
        if($.trim($(this).val()) == ""){
            $(this).val($(this).attr("placeholder")).addClass('placeholder');
        }
        $(this).on("focus",function(){
            $(this).hasClass('placeholder') ? $(this).val('').removeClass('placeholder') : false;
        }).on("blur",function(){
            $(this).val() == '' ? $(this).val($(this).attr("placeholder")).addClass('placeholder') :false;          
        });
    });     
}