<SCRIPT LANGUAGE="JavaScript">
<!--
var total = 0
var play = false
function testspeed(element)
{
var now = new Date()
if (!play) {
play = true
startTime = now.getTime()
}
if (now.getTime() - startTime > 20000) {
element.checked = !element.checked
alert("在20秒内您总共点击"+total+"次！")
return
}
if (element.checked)
total++
else
total--
element.form.num.value = total
}
function restart(form) {
total = 0
play = false
for (var i = 1; i <= 100; ++i) {
form.elements[i].checked = false
}
}
// -->
</SCRIPT>
</head>
<body>
<CENTER>
<form>
测试时间20秒，当前点击<INPUT TYPE="text" VALUE="0" NAME="num" SIZE=10 onFocus="this.blur()">次<BR>
<HR SIZE=1 WIDTH=200>
<SCRIPT LANGUAGE="JavaScript">
<!--
for (var i = 0; i < 10; i++) { // 循环出行和列
for (var j = 0; j < 10; j++) {
document.write('<INPUT TYPE="checkbox" ');
document.write('onClick="testspeed(this)">')}
document.write("<BR>")}
// -->
</SCRIPT>
<HR SIZE=1 WIDTH=200>
<INPUT TYPE="button" VALUE="restart" onClick="restart(this.form)">
</FORM>
</CENTER>
</body>