Loading

web页面背景色控制

有一道题要实现输入rgb数值,实现更换页面背景色的功能,如下图所示:

答案:

<html>
<head>
<script type="text/javascript">
    window.onload=function(){
        var change = document.getElementById("change");
            change.onclick = function(){
                var r = document.getElementById("r").value;
                var g = document.getElementById("g").value;
                var b = document.getElementById("b").value;
                document.body.style.backgroundColor = "rgb("+r+","+g+","+b+")";
            }
    }
</script>
</head>
<body>
r: <input type="text" id="r" value="123"/><br>
g: <input type="text" id="g" value="123"/><br>
b: <input type="text" id="b" value="123"/><br>
<button id="change">change</button
</body>
</html>

 

posted @ 2016-06-16 21:56  guwei4037  阅读(1725)  评论(0编辑  收藏  举报