var un = false;
  	function uname(){
  		var name = document.getElementById("uname").value;
  		var len = name.length;
  		if(null == name || "" == name){
  			return un;
  		}else{
  			if(len<6){
  				return un;
  			}else{
  				if(len>30){
  					return un;
  				}else{
  					un = true;
  				}
  			}
  		}
  		return un;
  		}
  	var up = false;
  	function pass(){
  		var userpass = document.getElementById("userpass").value;
  		var len = userpass.length;
  		if(null == userpass || "" == userpass){
  			return up;
  		}else{
  			if(len<6){
  				return up;
  			}else{
  				if(len>30){
  					return up;
  				}else{
  					up = true;
  				}
  			}
  		}
  		return up;
  	}
  	var uy = false;
  	function yan(){	
  		var yan = document.getElementById("yanzhe").value;
  		var rand1 = document.getElementById("rand1").value;
  		if(yan == null || ""==yan){
  			return uy;
  		}else{
  			uy = true;
  		}
  		return uy;
  	}
  	function log(){
  		if(un==true&&up==true&&uy==true){
  			var name = document.getElementById("uname").value;
  			var userpass = document.getElementById("userpass").value;
  			document.location.href="member.do?method=login&username="+name+"&userpassword="+userpass;
  		}
  	}