<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>计时器</title><script type="text/javascript"> var i; function clock(){ var time=new Date(); document.getElementById("clock").value = time; } i=setInterval("clock()",10000); </script></head><body> <form> <input type="text" id="clock" size="50" /> <input type="button" value="Stop" onclick="clearInterval(i)" /> </form></body></html>
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