<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>計時器</title></head><script type="text/javascript">? var num=0;? function startCount() {??? document.getElementById('count').value=num;??? num=num+1;??? setTimeout("startCount()", 1000);? }? //startCount();//不能運行？？？? //window.onload = startCount;//調用函數，ok? setTimeout(startCount,0);//ok</script></head><body><form><input type="text" id="count" /></form></body></html>第一個注釋那里為什么不能運行？？？
關于setTimeout計時器
qq_伏特加_0
2016-09-16 11:26:58
