我想做一个Button,在页面加载的时候有几秒钟的时间它是不可用的,visible=false.
然后时间到了visible=true,就和论坛注册时阅读条款时同意和不同意那种功能一样,请问怎么实现?
是用判断语句还是有专门的语法结构?

没机会上机实践,这样写对吗?
[CODE]<script language="JavaScript">
var secs = 9;
var wait = secs * 1000;
document.bbrules.rulesubmit.value = "同 意(" + secs + ")";
document.bbrules.rulesubmit.disabled = true;
for(i = 1; i <= secs; i++) {
window.setTimeout("update(" + i + ")", i * 1000);
}
window.setTimeout("timer()", wait);
function update(num, value) {
if(num == (wait/1000)) {
document.bbrules.rulesubmit.value = "同 意";
} else {
printnr = (wait / 1000)-num;
document.bbrules.rulesubmit.value = "同 意(" + printnr + ")";
}
}
function timer() {
document.bbrules.rulesubmit.disabled = false;
document.bbrules.rulesubmit.value = "同 意";
}
</script>[/CODE]