定时器

var jumping = false;
	//hqCode
	$("#hqCode").on('click',function(){
		if (jumping) return false;
		jumping = true;
		$(this).addClass("spanGrey").text("60s");
		jump(60);
		getSmscaptcha();
	});
	
     
   function jump(count) { 
		window.setTimeout(function(){ 
			count--; 
			if(count >= 0) { 
				$('#hqCode').text(count+'s'); 
				jump(count); 
			} else { 
				$('#hqCode').removeClass("spanGrey").text("获取验证码");
				jumping = false;
			} 
		}, 1000); 
	}