求一个简单代码,需要在页面每一秒显示一个".",最后还可以通过某个特殊事件停止输出"."。
我的代码function keepcheck()
{
document.write(".");
timer = setTimeout("keepcheck()",1000); //1s执行一次继续检查
}
keepcheck();可是页面只输出了一个点,求高手指导!
在线等,谢谢
我的代码function keepcheck()
{
document.write(".");
timer = setTimeout("keepcheck()",1000); //1s执行一次继续检查
}
keepcheck();可是页面只输出了一个点,求高手指导!
在线等,谢谢
<script>
/*
function keepcheck()
{
document.write(".");
timer = setTimeout("keepcheck()",1000); //1s执行一次继续检查
}
keepcheck();*/
document.getElementById('test').innerHTML="1";
</script>
<body>
<div id="test"></div>
</body>这样写为什么提示document.getElementById('test')为null
第二次 document.write("."); 输出了一个点,覆盖了第一次的点
第三次 document.write("."); 输出了一个点,覆盖了第二次的点
<span id="p"></span>
<script type="text/javascript">
var timer = null;
function keepcheck()
{
if(timer == null){clearTimeout(timer); timer = null;}
document.getElementById("p").innerHTML += ".";
timer = setTimeout(keepcheck, 1000); //1s执行一次继续检查
}
onload = function(){
keepcheck();
}
</script>
function keepcheck(){
timer = setInterval(function(){
document.write(".");
},1000); //1s执行一次继续检查
}
function stopKeep(){
clearTimeout(timer);
}
//运行代码
keepcheck();
setTimeout(stopKeep,5000)
{
document.getElementById("div1").innerHTML += ".";
timer = setTimeout("keepcheck()",1000); //1s执行一次继续检查
}
keepcheck();
<div id="div1">
</div>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<style type="text/css">
div{width:100%;height:100px;border:solid 1px red;}
</style>
<script type="text/javascript">
var $ = function(id){ return document.getElementById(id);};
var timer;
window.onload = function(){
$("btn").onclick=function(){
if(timer&&this.value=="暂停")
clearInterval(timer);
else
timer = setInterval(print,1000);
this.value=this.value=="暂停"?"继续":"暂停";
}
}
function print(){
$("test").innerHTML=$("test").innerHTML+'.';
}
</script>
</head>
<body>
<div id="test"></div>
<input type="button" value="继续" id="btn" />
</body>
</html>
<script type="text/javascript" src="jquery-1.4.1.js"></script>
<script type="text/javascript">
var count=0;
function keepcheck()
{
document.write(count);
count++;
var timer = setTimeout("keepcheck()",1000);
}
keepcheck();
</script>
</head><body >
<form></form>
</body></html>结果是在界面先显示0,然后显示1,最后一直等待无响应,基本上是符合二楼的观点
至于原因我想应该是document.write()本身的问题
{
document.write(".");
}
keepcheck();
timer = setTimeout("keepcheck()",1000); //1s执行一次继续检查