<body onload="go()" onbeforeunload="alert('你一共呆了'+document.myform.clock.value )"> <form name="myform"> <input name="clock"> </form> <script language="JavaScript"> var id, iM = 0, iS = 1; start = new Date(); function go() { now = new Date(); time = (now.getTime() - start.getTime()) / 1000; time = Math.floor( time); iS = time % 60; iM = Math.floor( time / 60); if ( iS < 10) document.myform.clock.value = " " + iM + " 分 0" + iS + " 秒"; else document.myform.clock.value = " " + iM + " 分 " + iS + " 秒"; id = setTimeout( "go()", 1000); } </script>
<form name="myform">
<input name="clock">
</form>
<script language="JavaScript">
var id, iM = 0, iS = 1;
start = new Date();
function go()
{
now = new Date();
time = (now.getTime() - start.getTime()) / 1000;
time = Math.floor( time);
iS = time % 60;
iM = Math.floor( time / 60);
if ( iS < 10)
document.myform.clock.value = " " + iM + " 分 0" + iS + " 秒";
else
document.myform.clock.value = " " + iM + " 分 " + iS + " 秒";
id = setTimeout( "go()", 1000);
}
</script>