问答详情
源自：8-5 计时器setTimeout()

关于定时器

为什么点一下按钮，文本框的数字就只加一；；而我要效果是点一下按钮，文本框内容就从0开始自动计数，请问哪里写错了？？？？？？

提问者：Ewall_ 2015-03-07 13:44

个回答

  • menghuanbaolei
    2015-03-07 14:13:17
    已采纳

    <!DOCTYPE HTML>

    <html>

    <head>

    <meta charset="utf-8">

    <title>计时器</title>

    </head>

    <script>

    window.onload=function ()

    {

        var oTxt1=document.getElementById("txt1");

        var oBtn1=document.getElementById("btn1");

        var num=0;

        

        oBtn1.onclick=function tt()

        {

             var time=setTimeout(function(){

              num++;

    oTxt1.value=num;

    setTimeout(tt(),0);

    },1000);

        }

        

    }

    </script>

    </head>

    <body>

    <form>

    <input id="txt1" type="text" />

    <input id="btn1" type="button" value="点击" />

    </form>

    </body>

    </html>



    0
  • menghuanbaolei
    2015-03-07 14:14:21

    <!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>计时器</title>
</head>
<script>
window.onload=function ()
{
    var oTxt1=document.getElementById("txt1");
    var oBtn1=document.getElementById("btn1");
    var num=0;
    
    oBtn1.onclick=function tt()
    {
         var time=setTimeout(function(){
         	num++;
oTxt1.value=num;
setTimeout(tt(),0);
},1000);
    }

    
}
</script>
</head>
<body>
<form>
<input id="txt1" type="text" />
<input id="btn1" type="button" value="点击" />
</form>
</body>
</html>


    0