tryjs_setinterval2 在线代码实例

 <p>在页面显示一个时钟</p>
<p id="demo"></p>
<script>
var myVar = setInterval(function(){ myTimer() }, 1000);

function myTimer() {
    var d = new Date();
    var t = d.toLocaleTimeString();
    document.getElementById("demo").innerHTML = t;
}
</script>