请问加粗地方的代码为什么没有执行，求大神指教。
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
#div1 {width: 100px; height: 100px; background-color: #aab4bc;position: absolute;left: 0px;}
</style>
<script>
window.onload=function(){
var odiv1=document.getElementById("div1");
var obtn1=document.getElementById("btn1");
var obtn2=document.getElementById("btn2");
var obtn3=document.getElementById("btn3");
var obtn4=document.getElementById("btn4");
var timer=null;
obtn1.onclick=function () {
clearInterval(timer)
timer = setInterval(function () {
odiv1.style.left = odiv1.offsetLeft + 5 + "px"
}, 30);
}
obtn2.onclick=function(){
clearInterval(timer)
};
obtn3.onclick=function(){
clearInterval(timer)
timer=setInterval(function(){odiv1.style.left=odiv1.offsetLeft-5+"px"},30)
};
obtn4.onclick=function(){
alert(odiv1.offsetLeft);
}
if (odiv1.offsetLeft<0){
alert("!!!");
};
}
</script>
</head>
<body>
<input type="button" value="向右移动" id="btn1"><input type="button" id="btn2" value="停止移动"><input type="button" value="向左移动" id="btn3">
<input type="button" value="当前边距" id="btn4">
<div id="div1"></div>
</body>
</html>
慕田峪87015298回答
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慕瓜9220888
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
无畏前行
同意楼上
随时随地看视频慕课网APP
相关分类
JavaScript