關(guān)于定時(shí)器
為什么點(diǎn)一下按鈕，文本框的數(shù)字就只加一；；而我要效果是點(diǎn)一下按鈕，文本框內(nèi)容就從0開始自動(dòng)計(jì)數(shù)，請(qǐng)問哪里寫錯(cuò)了？？？？？？
Ewall_
2015-03-07
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2015-03-07
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>計(jì)時(shí)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="點(diǎn)擊" />
</form>
</body>
</html>
2015-03-07
<!DOCTYPE?HTML> <html> <head> <meta?charset="utf-8"> <title>計(jì)時(shí)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="點(diǎn)擊"?/> </form> </body> </html>