“是否同意”按钮的实现

[script type=”text/javascript”]
ar secs = 3;
var agree = document.getElementById(”agreeb”);
agree.disabled=true;
for(i=1;i<=secs;i++)
{
window.setTimeout(”update(” + i + “)”, i * 1000);
}
function update(num)
{
if(num == secs)
{
agree.value =” 我 同 意 “;
agree.disabled=false;
}
else
{
printnr = secs-num;
agree.value = “请认真查看<服务条款和声明> (” + printnr +” 秒后继续)”;
}
}
[script]