ASP, PHP and JavaScript switch CSS skin code based on time slots

A website can switch different CSS styles you should all understand, like the well-known Tencent in this year's revision also increased the function of switching skin. According to the time to automatically adjust the site style is a good idea, the time to automatically adjust the site style is not new, remember a long time ago have seen similar articles or methods, but did not pay special attention. Here are a few ways to implement them, and there are two ways to implement them online:

First, the use of service-side code

ASP version:

<link rel="stylesheet" type="text/css" href="
<%
　　if hour(now)<12 then
　　　　　response.write "morning.css"
　　elseif hour(now)<17 then
　　　　response.write "day.css"
　　　else
　　　　response.write "night.css"
　　　end if
%>
"/>

PHP Version:

<link rel="stylesheet" type="text/css" href="
<?php
　　$hour = date(”H”);
　　if($hour < 12)
　　　　echo ‘morning.css’;
　　else if($hour < 17)
　　　　echo ‘day.css’;
　　else
　　　　echo ‘night.css’;
?>
" />

Second, the use of JavaScript code

<script type="text/javascript">
<!–
　　function getCSS(){
　　　　datetoday = new Date();
　　　　timenow=datetoday.getTime();
　　　　datetoday.setTime(timenow);
　　　　thehour = datetoday.getHours();
　　　　if (thehour<12)
　　　　　　display = "morning.css";
　　　　else if (thehour<17)
　　　　　　display = "day.css";
　　　　else
　　　　　　display = "night.css";
　　　　//（…想要更多再加即可…）
　　　　var css = ‘<’;
　　　　css+=’link rel="stylesheet" href=’+display+’\/’;
　　　　css+=’>’;
　　　　document.write(css);
　　}
–>
</script>

Given that the client may not support or disallow JavaScript, you need to set a default CSS.