本文实例讲述了javascript定时器的简单应用。分享给大家供大家参考，具体如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>www.qb5200.com 定时器的应用</title>
<style>
#Div1 { width: 100px; height: 100px; position: absolute; background-color: red; top: 50px; }
</style>
</head>
<body>
<input id="oBtn1" type="button" value="铵钮">
<div id="Div1"></div>
<script>
var oBtn = document.getElementById("oBtn1");
var oDiv = document.getElementById("Div1");
//var timer=null;
//oDiv.timer=null;
oBtn.onclick = function() {
clearInterval(oDiv.timer)
oDiv.timer = setInterval(function() {
var speed = parseInt(getStyle(oDiv, "left")) + 9;
if(speed > 800) {
speed = 800;
}
oDiv.style.left = speed + "px"
if(speed == 800) {
clearInterval(oDiv.timer);
//alert(speed)
}
}, 50)
}
function getStyle(obj, attr) {
return obj.currentStyle ? obj.currentStyle[attr] : getComputedStyle(obj)[attr]
}
</script>
</body>
</html>
运行结果：
希望本文所述对大家JavaScript程序设计有所帮助。
