text: 
  	var wait=60;
  	function time(o) {
  			if (wait == 0) {
  				o.removeAttribute("disabled");           
  				o.value="获取验证码";
  				wait = 60;
  			} else { 
  				o.setAttribute("disabled", true);
  				o.value="重新发送(" + wait + ")";
  				wait--;
  				setTimeout(function() {
  					time(o)
  				},
  				1000)
  			}
  		}
  	//document.getElementById("btn").onclick=function(){time(this);}
  	//document.getElementById("btn1").onclick=function(){time(this);}
  