测试反应能力

下面为效果显示

说明：点击'开始'后，一旦上面的白色变化，就点'停止'，这样就能测试你的反应时间

脚本说明:
把如下代码加入<body>区域中
<script language="JavaScript">
<!--

var startTime=new Date();
var endTime=new Date();
var startPressed=false;
var bgChangeStarted=false;
var maxWait=20;
var timerID;

var colors=new Array("tomato","chocolate","limegreen","crimson","darkslategray",
"aliceblue","mediumslateblue","cornflowerblue","darkorchid","darkkhaki","coral",
"darkolivegreen","cadetblue")

if (document.all||document.getElementById)
document.write('<div id="reflex" style="width:135;height:135;border:1px solid black" onClick="stopTest()"></div>')

function startTest()
{
        if (document.all)
        document.all.reflex.style.backgroundColor=colors[Math.floor(Math.random()*colors.length)];
        else if (document.getElementById)
	document.getElementById("reflex").style.backgroundColor=colors[Math.floor(Math.random()*colors.length)];
        else if (document.layers)
        document.reflexns.document.reflexns_sub.document.bgColor=colors[Math.floor(Math.random()*colors.length)];
	bgChangeStarted=true;
	startTime=new Date();
}

function remark(responseTime)
{
	var responseString="";
	if (responseTime < 0.10)
		responseString="非常好!";
	if (responseTime >= 0.10 && responseTime < 0.20)
		responseString="很好!";
	if (responseTime >=0.20 && responseTime < 0.30)
		responseString="你已经很不错了，但是应该还可以更好些的...";
	if (responseTime >=0.30 && responseTime < 0.60)
		responseString="请保持这样的情况!";
	if (responseTime >=0.60 && responseTime < 1)
		responseString="你一定是喝多了才会这样慢的";
	if (responseTime >=1)
		responseString="难道你已经睡着了？";

return responseString;
}

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;
}