window电脑桌面界面系统代码

now = new Date();
erke = now.getSeconds();
erke = erke - parseInt(erke/4)*4 + 1;
</script>
<script language="javascript">
document.write("<img style='position:fixed;' src='images/bg"+erke+".jpg' height='100%' width='100%' />")
</script></div>
        <div id="task-bar">
            <ul class="task-window">                
            </ul>
		
            <ul class="task-panel">
                <li class="sys" title="电脑桌面"><b class="">电脑桌面</b></li>
            </ul>
		
        </div>
        <div id="desk"><ul></ul></div>
		<div style="display:none;">