javascript样式切换,图片切换,随机背景

http://www.cssrain.cn/article.asp?id=560

<link id="rain" href="http://bbs.blueidea.com/forumdata/cache/style_2.css" rel="stylesheet" type="text/css">
</HEAD>
<script>
function changeStyle(url){
cacheobj=document.getElementById("rain");
cacheobj.href=url
}
</script>
<BODY>
<a href="javascript:changeStyle('http://www.redflystudios.com/css_style.css');">样式1</a>
<a href="javascript:changeStyle('http://www.wz-qs.com/css.css');">样式2</a>
<a href="javascript:changeStyle('http://bbs.blueidea.com/forumdata/cache/style_2.css');">默认样式</a>




图片切换:

程序代码 程序代码
<select name="selectface" onchange="cssrain(options[selectedIndex].value);">

<script>
for(i=1;i<12;i++)
{
document.write("<option value=http://www.makewing.com/lanren/emotions/07/"+i+".gif>头像"+i+"</option>");
}
</script>
</select>

<img id="face" src="http://www.makewing.com/lanren/emotions/07/1.gif">

<SCRIPT LANGUAGE="JavaScript">
function cssrain(obj)
{
document.getElementById("face").src=obj;
}
</SCRIPT>



随即背景:

程序代码 程序代码
<Script Language="JavaScript">
   image = new Array(2); //定义image为图片数量的数组
   image [0] = 'http://www.cssrain.cn/skins/tim/logo-jq.gif' //背景图象的路径
   image [1] = 'http://www.cssrain.cn/demo/JQuery+API/logo-json.gif'
   image [2] = 'http://www.cssrain.cn/skins/tim/isll_t.gif'
   number = Math.floor(Math.random() * image.length);
   document.write("<BODY BACKGROUND="+image[number]+">");
</Script>



网页最后修改时间:

程序代码 程序代码
<script language="LiveScript">
<!-- Hiding
  today = new Date()
  document.write("现 在 时 间 是: ",today.getHours(),":",today.getMinutes())
  document.write("<br>今 天 日 期 为: ", today.getMonth()+1,"/",today.getDate(),"/",today.getYear());
// end hiding contents -->
</script>

<html>
<body>
This is a simple HTML- page.
<br>
Last changes:
  <script language="LiveScript">
  <!--  hide script from old browsers
    document.write(document.lastModified)
  // end hiding contents -->
  </script>
</body>
</html>



获取上传文件的大小:

程序代码 程序代码
<html>  
<input type="file" name="uploadfiles" onchange="ShowSize(this.value)">  <span id="rain"></span>
<script language="JavaScript">  
<!--  
/**
* obj 创建文件对象
* FilesObj 得到文件所上传的文件对像
* mySize 被上传文件的大小
*/
function ShowSize(files)  
{  
   var obj,FilesObj ;  
   obj = new ActiveXObject("Scripting.FileSystemObject");  
   FilesObj = obj.GetFile(files);

   var mySize = FilesObj .size/(1024*1024);
   document.getElementById("rain").innerHTML=mySize+" M ";
}  
//-->  
</script>  
</html>
原文地址:https://www.cnblogs.com/luluping/p/1440073.html