日期:2014-05-16  浏览次数:20460 次

JS计时
假设我现在有6个button(数量不定)
请问如何实现如下效果:
1.当我双击其中任一一个按钮时,其它button均为灰色不可用状态
2.同时,应该双击的button的value开始变成从双击开始到现在的时间,且为自动刷新
3.再次双击时,停止计时并其它button恢复为可用状态。
想了一些方法,但总感觉不太理想,特别如何进行计时,感觉没什么好的办法。
请高手指点一下,不胜感激!

------解决方案--------------------
计时
http://www.w3school.com.cn/htmldom/met_win_setinterval.asp
另外在双击事件时传一个this参数会使代码简化
------解决方案--------------------
HTML code
<!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>
<script type="text/javascript">
var timer = 0, t;
function timing(buttonID) {
    var now = new Date();
    now = Math.round(parseInt(now.getTime() / 1000));
    document.getElementById(buttonID).value = now - timer;
}
window.onload = function() {
    var obj = document.getElementById('demo').getElementsByTagName('input');
    for (var i = 0; i < obj.length; i ++) {
        obj[i].ondblclick = function() {
            for (var j = 0; j < obj.length; j ++) obj[j].disabled = true;
            this.disabled = false;
            if (this.value == this.id) {
                timer = new Date();
                timer = Math.round(parseInt(timer.getTime()) / 1000);
                t = window.setInterval('timing("' + this.id + '")', 1000);
            }
            else {
                window.clearInterval(t);
                for (var j = 0; j < obj.length; j ++) obj[j].disabled = false;
                this.value = this.id;
            }
        }
    }
}
</script>
</head>

<body>
<form id="demo">
    <input type="button" id="BUTTON1" value="BUTTON1" />
    <input type="button" id="BUTTON2" value="BUTTON2" />
    <input type="button" id="BUTTON3" value="BUTTON3" />
    <input type="button" id="BUTTON4" value="BUTTON4" />
    <input type="button" id="BUTTON5" value="BUTTON5" />
    <input type="button" id="BUTTON6" value="BUTTON6" />
</form>
</body>
</html>