网页倒计时练习

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>

<body>
<form>
  <input type="submit" name="b1" id="b1" value="同意(10)" disabled="disabled"/>
</form>
</body>
</html>
<script>
var n=10;
var a=document.getElementById("b1");
function bian()
{
    n--;
    if(n==0)
    {
        a.removeAttribute("disabled");
        a.value="同意";
        return;
        }
    else
    {
        a.value="同意("+n+")"
        window.setTimeout("bian()",1000);
        }
    }
window.setTimeout("bian()",1000);
</script>

 

posted on 2015-05-18 10:42  wang_w_J  阅读(108)  评论(0编辑  收藏  举报

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