The example in this article describes the js method of setting a random background color to the Div layer after clicking the button. Share it with everyone for your reference. The details are as follows:
Set a random background color to myDiv and assign the random color code to the background color of the DIV
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312"/>
<title>js设置随机颜色 </title>
</head>
<body>
<script type="text/javascript">
function getcl(){
var arr = []//定义一个空的数组
i =0;//为while循环定义i的初始值
C = '0123456789ABCDEF';
//定义颜色代码的字符串
while(i++ < 6){//循环6次
x=Math.random()*16;
//取0-16之间的随机数给变量x
b=parseInt(x);//取0-16之前的整数给变量b
c=C.substr(b,1);
//由第b（0-16之间的整数）位开始取一个字符
arr.push(c);
//通过6次循环得到的随机位置取得的字符组合在一起把值给到arr这个数组
}
var cl = "#"+ arr.join('');
//去掉之前数组之间的逗号，前面再加一个井号，
//这样颜色随机的颜色代码就生成了，并且把颜色代码赋值给变量cl
return cl;//把cl的值返回给函数getcl()
}
document.write(cl);
//输出cl测试一下结果
//下面开始给div的背景颜色赋值
function setColor(){
//新建一个设置颜色的函数setColor
document.getElementById("myDiv").style.backgroundColor = getcl();
//把上面得到的随机颜色代码赋值给DIV的背景颜色
}
</script>
<div id="myDiv" style="width:200px;height:200px;"></div>
<input type="button" value="给myDiv设置随机背景颜色"
onclick="setColor()" />
</body>
</html>I hope this article will be helpful to everyone’s JavaScript programming design.
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