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JavaScript method to switch the background color of a web page by clicking a button_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:36:142572browse

The example in this article describes how to use JavaScript to switch the background color of a web page by clicking a button. Share it with everyone for your reference, the details are as follows:

Here is a demonstration of JavaScript using buttons to change the background color at will. Every time you click the button, you can randomly change the background color of a web page. The color values ​​are stored in JS arrays in advance. You will find them in the code. If you don't want a certain color, just replace it.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-btn-click-rand-bgcolor-codes/

The specific code is as follows: 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>通过按钮变换背景颜色</title>
</head>
<body>
<script language="javascript">
var Arraycolor=new Array("olive","teal","red","blue","maroon","navy","lime","fuschia","green","purple","gray","yellow","aqua","white","silver");
var n=0;
function turncolors(){
  if (n==(Arraycolor.length-1)) n=0;
  n++;
  document.bgColor = Arraycolor[n];
}
</script>
<form name="form1" method="post" action="">
 <p>
 <input type="button" name="Submit" value="变换背景" onclick="turncolors()">
</p>
 <p>用按钮变换背景颜色.</p>
</form>
</body>
</html>

I hope this article will be helpful to everyone in JavaScript programming.

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