60秒倒计时的一个小JAVASCRIPT

<SCRIPT>

secs = 60; // Number of secs to delay -CHINA-studio

wait = secs * 100;

document.forms.register.Submit.disabled =true;

for(i=1;i<=(wait/100);i++) {

window.setTimeout("doUpdate(" + i + ")", i * 100);

}

window.setTimeout("Timer()", wait);

function doUpdate(num) {

if(num == (wait/100)) {

document.forms.register.Submit.value = " 同意注册 ";

} else {

wut = (wait/100)-num;

document.forms.register.Submit.value = " 同意前请先阅读 (" + wut + ")";

}

}

function Timer() {

document.forms.register.Submit.disabled =false;

}

</SCRIPT>