javascript计算器
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript">
window.onload = function(){
var start = document.getElementById("start");
var stop = document.getElementById("stop");
start.onclick = function(){
开始计时();
}
stop.onclick = function(){
clearInterval(time);
}
}
var i = 0;
var time;
function 开始计时(){
time = setTimeout(function(){
++i;
var div1 = document.getElementById("div1");
div1.innerHTML = "系统已经运行了"+i+"秒";
开始计时()
},1000);
}
</script>
</head>
<body>
<div id="div1">系统已经运行了0秒</div>
<input type="button" name="start" id="start" value="开始计时" />
<input type="button" name="stop" id="stop" value="结束计时" />
</body>
</html>
js，计时器
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