仿jq官方网站的蓝色大气导航和可伸缩的input框，不兼容IE6

仿jq官方网站的蓝色大气导航和可伸缩的input框，不兼容IE6

<link href="style/style.css" rel="stylesheet" type="text/css" />
<script src="https://5.jimth.com/download/jquery/jquery-1.8.3.min.js"></script>
<script>
$(function(){
$("#text").focus(function(){
    if($(this).val() == ""){
        $("label").animate({opacity:0.5},500);
        $(this).animate({width:"140px"},500);
    }
}).blur(function(){
    if($(this).val() == ""){
        $("label").animate({opacity:1},500);        
        $(this).animate({width:"50px"},500);
    }
}).keyup(function(){
        $("label").animate({opacity:0},1);
})
})
</script>

<div id="navigation" class="wrap">
    <div id="nav_left" class="fl"></div>
    <ul id="nav_main" class="fl">
        <li><a href="###">Download</a></li>
        <li><a href="###">API Documentation</a></li>
        <li><a href="###">Blog</a></li>
        <li><a href="###">Plugins</a></li>
        <li><a href="###">Browser Support</a></li>
        <li><a href="###">Search jQuery</a></li>
    </ul>
    <div id="nav_search" class="fl">
        <label for="text">Search</label>
        <div id="search_left_bg" class="fl"></div>
        <input type="text" id="text" class="fl" />
        <div id="search_line" class="fl"></div>
        <input type="button" class="fl" />
    </div>
    <div id="nav_right" class="fl"></div>
</div>