var format_name=/^[a-zA-Z][a-zA-Z0-9_]{3,29}$/;
	
	if (top.location != self.location) {
	    top.location = self.location;
    }
	
	function changeCode() {
	    document.getElementById("vCode").src = "validateImage.jpg?" + Math.random(1);
	}
	
	function load_login(){
  		var message = document.getElementById("message").innerHTML;
  		if (message == '' || message == null) {
  		    document.getElementById("message").style.display = "none";
  		} else {
  		    document.getElementById("message").style.display = "block";
  		}
	}
	
	function loginInfo(){
		var sellerNo = document.getElementById("sellerNo").value.replace(/^\s+|\s+$/g,"");
		if (sellerNo.length < 4 || sellerNo.length > 30) {
			document.getElementById("message").innerHTML = "商店号长度为4－30个字符";
			document.getElementById("message").style.display = "block";
			document.getElementById("sellerNo_note").innerHTML = "";
			return false;
		} else {
			document.getElementById("message").style.display = "none";
		}
		
		var username = document.getElementById("username").value.replace(/^\s+|\s+$/g,"");
		if (username.length < 4 || username.length > 30) {
			document.getElementById("message").innerHTML = "用户名长度为4－30个字符";
			document.getElementById("message").style.display = "block";
			document.getElementById("username_note").innerHTML = "";
			return false;
		} else if ((username.indexOf("-") == 0) || (username.match(format_name) == null)){
		    document.getElementById("message").innerHTML = "用户名以字母开头,字母数字和下划线的组合";
			document.getElementById("message").style.display = "block";
			document.getElementById("username_note").innerHTML = "";
			return false;
		} else {
			document.getElementById("message").style.display = "none";
		}
		
		var password = document.getElementById("password").value.replace(/^\s+|\s+$/g,"");
		if (password.length < 6 || password.length > 16) {
			document.getElementById("message").innerHTML = "密码长度为6－16个字符";
			document.getElementById("message").style.display = "block";
			document.getElementById("password_note").innerHTML = "";
			return false;
		} else {
			document.getElementById("message").style.display = "none";
		}
		
		var validateCode = document.getElementById("validateCode").value.replace(/^\s+|\s+$/g,"");
		if (validateCode.length != 4) {
			document.getElementById("message").innerHTML = "验证码长度为4位";
			document.getElementById("message").style.display = "block";
			return false;
		} else {
			document.getElementById("message").style.display = "none";
			return true;
		}
	}