测试反应时间脚本

<SCRIPT language=JavaScript>
	<!-- hiding for old browsers
	// response time test, created by Jasper van Zandbeek
	// e-mail: [email protected]
	var startTime=new Date();
	var endTime=new Date();
	var startPressed=false;
	var bgChangeStarted=false;
	var maxWait=20;
	var timerID;
	function startTest()
	{
	document.bgColor=document.response.bgColorChange.options[document.response.bgColorChange.selectedIndex].text;
	bgChangeStarted=true;
	startTime=new Date();
	}
	function remark(responseTime)
	{
	var responseString="";
	if (responseTime > 0 && responseTime <0.01)
	responseString="你还是人吗？"
	if (responseTime >.01 && responseTime <.05 )
	responseString="你快如闪电啊！";
	if (responseTime >= 0.05 && responseTime <.10)
	responseString="干得漂亮";
	if (responseTime >= 0.10 && responseTime < 0.20)
	responseString="不错！";
	if (responseTime >=0.20 && responseTime < 0.30)
	responseString="还可以更好...";
	if (responseTime >=0.30 && responseTime < 0.60)
	responseString="多加练习！";
	if (responseTime >=0.60 && responseTime < 1)
	responseString="喝醉酒了？";
	if (responseTime >=1)
	responseString="我想你是睡着了！";
	return responseString;
	}
	function stopTest()
	{
	if(bgChangeStarted)
	{
	endTime=new Date();
	var responseTime=(endTime.getTime()-startTime.getTime())/1000;
	document.bgColor="aliceblue";
	alert("你的反应时间是：" + responseTime + " 秒 " + "/n" + remark(responseTime));
	startPressed=false;
	bgChangeStarted=false;
	}
	else
	{
	if (!startPressed)
	{
	alert("先按“开始”键启动测试");
	}
	else
	{
	clearTimeout(timerID);
	startPressed=false;
	alert("骗子！你提早按结束键了！");
	}
	}
	}
	var randMULTIPLIER=0x015a4e35;
	var randINCREMENT=1;
	var today=new Date();
	var randSeed=today.getSeconds();
	function randNumber()
	{
	randSeed = (randMULTIPLIER * randSeed + randINCREMENT) % (1 << 31);
	return((randSeed >> 15) & 0x7fff) / 32767;
	}
	function startit()
	{
	if(startPressed)
	{
	alert("已经开始了，按“结束”键结束");
	return;
	}
	else
	{
	startPressed=true;
	timerID=setTimeout('startTest()', 6000*randNumber());
	}
	}
	// -->
	</SCRIPT>