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 减小字体
 增大字体
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML1.0 Transitional //EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
<html xmlns="http://www.w3.org/1999/xhtml" lang="gb2312">
<meta http-equiv="Content-type" content="text/html;charset=gb2312" />
<head>
<title>No.Javascript倒计时演示</title>
</head>
<!-- 经常看到注册会员时，接受协议所用到的效果 -->
<BODY>
<textarea name="content" readonly>fsdf</textarea>
<input type="button" id="agree" value="请认真查看<服务条款和声明> (10)" onclick="location.href='xxxx.asp'">
</BODY>
</HTML>
<script type="text/javascript">
var settime=10;
var i;
var showthis;
document.all.agree.disabled=true;
for(i=1;i<=settime;i++) {
setTimeout("update("+i+")",i*1000);
}
function update(num) {
if(num==settime) {
document.all.agree.value="我同意";
document.all.agree.disabled=false;
}
else {
showthis=settime-num;
document.all.agree.value="请认真查看<服务条款和声明> ("+showthis+")";
}
}
</script>
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