短信验证倒计时60s

		$("#zphone").click(function(){
			var tel2 = $("#regTel").val();
			if(flag.tel){
				$.post(
						"<%=path%>/main/login_regCode.action",
						{"tel":tel2},
						function(data){
							if(data){
								if(data == "has"){
									RemainTime();
								}
							}
						}
					);
				return false;
			}else{
				alert("必须为移动用户！");
			}

		});

var iTime = 59;
	var Account;
	function RemainTime(){
		document.getElementById('zphone').disabled = true;
		var iSecond,sSecond="",sTime="";
		if (iTime >= 0){
			iSecond = parseInt(iTime%60);
			iMinute = parseInt(iTime/60);
			if (iSecond >= 0){
				if(iMinute>0){
					sSecond = iMinute + "分" + iSecond + "秒";
				}else{
					sSecond = iSecond + "秒";
				}
			}
			sTime=sSecond;
			if(iTime==0){
				clearTimeout(Account);
				sTime='获取手机验证码';
				iTime = 59;
				document.getElementById('zphone').disabled = false;
			}else{
				Account = setTimeout("RemainTime()",1000);
				iTime=iTime-1;
			}
		}else{
			sTime='没有倒计时';
		}
		document.getElementById('zphone').value = sTime;

		if(iTime == 0){
			alert("验证码超时！");
		}
	}

界面：
 <li>
   <label>验 证 码：
         <input type="text" name="code" class="ipt"  id="regCode"/>
         <input type="submit" id="zphone"  value="发送验证码" class="submitBtn1" />
           <font color="#ff0000">* 不能为空</font>
     </label>
</li>