<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>計時器</title><script type="text/javascript">? var num=0;? function startCount() {? ? document.getElementById('count').value=num;? ? num=num+1;? ?? }? ? ?setTimeout(startCount,1000);??</script></head><body><form><input type="text" id="count" /><input type="button" value="start" onclick="startCount()"/></form></body></html>
為什么將setTimeout（）放在function之外不會被執(zhí)行或者說看不到效果
沉淪之刃
2017-07-27 15:57:16
