<input type="text" name="搜索" value="搜索" placeholder="搜索" id="selector"/>

::-moz-placeholder{color:red;} //ff

::-webkit-input-placeholder{color:red;} //chrome,safari

:-ms-input-placeholder{color:red;} //ie10

$(function(){

if(!!navigator.userAgent.match(/MSIE 8.0/)){

$('input[placeholder], textarea[placeholder]').each(function() {

var input = $(this);

if (input.val() === '' && input.attr("placeholder") !== ''){

input.addClass("placeholder").val(input.attr('placeholder'));

}

input.focus(function() {

if (input.val() === input.attr('placeholder')) {

input.val('');

}

});

input.blur(function() {

if (input.val() === '' || input.val() === input.attr('placeholder')) {

input.val(input.attr('placeholder'));

}

});

});

}

});