function submitLoginForm(){
			
				var loginForm = document.getElementById('login');
				if(isNullShowForBuyer(loginForm.domainname.value,'lDomainNameError','email address required!')){
					return;
				}else {
					showLoginErrorTips("lDomainNameError",'',true);
				}
				
				if(isNullShowForBuyer(loginForm.password.value,'lpasswordError','password required!')){
					return;
				}else {
					showLoginErrorTips("lpasswordError",'',true);
				}
				
				if(isNullShowForBuyer(loginForm.code.value,'lcodeError','verify code required!')){
					return;
				}else {
					showLoginErrorTips("lcodeError",'',true);
				}
			
				document.getElementById('login').submit();
			}
			
			function isNullShowForBuyer(value , showDivId , message) {
				
				if(isNull(value)){
					showLoginErrorTips(showDivId,message,false);
					return true;
				}
				return false;
			}
			
			/**为注册显示错误提示信息的方法*/
			function showRegErrorTips(showDivId,errorMessage,isHidden){
				
				if(showDivId == null || showDivId == '') {
					return ;
				}
				
				if(isHidden){
					document.getElementById(showDivId).innerHTML = " ";
					return ;
				}
				
				var tipDiv = "<div class=\"tipRegBg\"></div>"
						   + "<div class=\"tipRegCon\">"
						   + "<img class=\"floatr\" alt=\"Close\" title=\"Close\" onclick=\"closeTips(this);\" src=\"http://image.linkchina.com/buyer/btn_close_tip.gif\" />"
						   + "<p>"	
						   + errorMessage	
						   + "</p></div>";
				//验证安全信息是否填写 比较特殊 需要多拼接一个IFrame
				if(showDivId == "securityError") {
					tipDiv += "<iframe src=\"javascript:false\" id=\"tipRegFrame\"></iframe>";
				}
				
				document.getElementById(showDivId).innerHTML = tipDiv;
			}
			
			/**为登陆显示错误提示信息的方法*/
			function showLoginErrorTips(showDivId,errorMessage,isHidden){

				if(showDivId == null || showDivId == '') {
					return ;
				}
				
				if(isHidden){
					document.getElementById(showDivId).innerHTML = "&nbsp;";
					return ;
				}
				
				var tipDiv = "<div class=\"tipLoginBg\"></div>"
						   + "<div class=\"tipLoginCon\">"
						   + "<img class=\"floatr\" alt=\"Close\" title=\"Close\" onclick=\"closeTips(this);\" src=\"http://image.linkchina.com/buyer/btn_close_tip.gif\" />"
						   + "<p>"	
						   + errorMessage	
						   + "</p></div>";
				
				document.getElementById(showDivId).innerHTML = tipDiv;
			}
			
			/**
			填写密码后的验证，先判断密码输入非空，合法，然后判断是否等于确认密码的输入项
			*/
			function confirmPass(){
				var regForm = document.getElementById("register");
				var fieldValue = regForm.password.value;
				
				if(isNull(fieldValue)){
					showRegErrorTips('passwordError','Please use 6 or more characters or numbers!',false);
					return false;
				}
				
				var flag = isPassword(fieldValue);
				if(flag){
					showRegErrorTips('passwordError','Please use 6 or more characters or numbers!',false);
					return false;
				}
				//判断下密码强度
				getPasswordStrong(fieldValue);
				
				showRegErrorTips('passwordError','&nbsp;',true);
				return true;
			}
			
			/**
			根据密码判断密码强度
			长度简单判断，6-10，10-15，15-20
			*/
			function getPasswordStrong(userPass){
			   	if(userPass != null && userPass.length < 10){
			   		document.getElementById('pwd_strength').style.display = 'block';
			   		document.getElementById('pwdPic').src = "http://image.linkchina.com/buyer/password_weak.gif";	
			   	}else if(userPass != null && userPass.length >= 10 && userPass.length < 15){
			   		document.getElementById('pwd_strength').style.display = 'block';
			   		document.getElementById('pwdPic').src = "http://image.linkchina.com/buyer/password_middling.gif";	
			   	}else if(userPass != null && userPass.length >=15 && userPass.length <=20){
			   		document.getElementById('pwd_strength').style.display = 'block';
			   		document.getElementById('pwdPic').src = "http://image.linkchina.com/buyer/password_strong.gif";	
			   	}
			}
			
			/**
			填写邮箱的验证，先判断邮箱输入非空，合法，然后判断是否等于确认邮箱的输入项
			Buyer中 e-mail 为登录时用户名
			*/
			function validDomainName() {
				var regForm = document.getElementById("register");
				var domainname = regForm.domainname.value;
				if(isNull(domainname)){
					showRegErrorTips('DomainNameError','E-mail Address is required!',false);
					return;
				}
				
				var flag = isEmail(domainname);
				if(flag){
					showRegErrorTips('DomainNameError','Please enter a valid email address again.',false);
					return;
				}
				
				jQuery.ajax({
				   url: "registerCheckEmail.do?domainname="+domainname,
				   dataType : "html",
				   cache: false,
			          type: 'GET', // 设置请求类型为 ‘POST’，默认为 ‘GET’
			          error: function(XMLHttpRequest, textStatus, errorThrown) {
			          		
			          },
			          success: function(data) {
			               　var msg = data;
					    	if(msg != null && msg == '&nbsp;'){
					    	   showRegErrorTips("DomainNameError","",true);
					    	}else{
				    	       showRegErrorTips('DomainNameError',msg,false);
				    		   return;
					    	}
			          }
			    });
				
			    showRegErrorTips('DomainNameError','',true);
			    return true;
			}
			
			/**
			填写确认密码后的验证，先判断确认密码输入非空，合法，然后判断是否等于密码的输入项
			*/
			function confirmPass1(){
				var regForm = document.getElementById("register");
				var fieldValue = regForm.password1.value;
				
				if(isNull(fieldValue)){
					//未必填不提示
					showRegErrorTips('password1Error','Please use 6 or more characters or numbers!',false);
					return false;
				}
				
				var flag = isPassword(fieldValue);
				if(flag){
					showRegErrorTips('password1Error','Please use 6 or more characters or numbers!',false);
					return false;
				}
				if(document.getElementById('password').value == document.getElementById('password1').value){
					showRegErrorTips('password1Error','',true);
					return true;
				}else{
					showRegErrorTips('password1Error','Passwords do not match！',false);
					return false;
				}
			}
			
			/**
			检验Nickname
			*/
			function confirmNickName() {
				var regForm = document.getElementById("register");
				var nickname = regForm.nickname.value;
				
				if(isNull(nickname)){
					showRegErrorTips('nicknameError','you can use 4 or more characters!',false);
					return false;
				}
				var flag = isAccountForBuyer(nickname);
				if(flag){
					showRegErrorTips('nicknameError','Nick name contains illegal characters!',false);
					return false;
				}
				showRegErrorTips('nicknameError','',true);
				return true;
			}
			
			function isAccountForBuyer(fieldValue){ 
				//帐户名合法性验证
				
				var patrn = /^[a-zA-Z][a-zA-Z_\d\s\.]{3,19}$/;
				
				if (patrn.exec(fieldValue)) {
					return false;
				}
				return true;
			} 
			
			/**
			验证用户注册时,是否填写密码保护提示答案
			*/
			function confirmAnswer1(){
				var regForm = document.getElementById("register");
				var fieldValue = regForm.answer1.value;
				
				if(isNull(fieldValue)){
					showRegErrorTips('securityError','Please enter safe answer!',false);
					return false;
				}
				showRegErrorTips('securityError','',true);
				return true;
			}
			
			function checkRegister(){
				showRegErrorTips('nicknameError','',true);
				showRegErrorTips('passwordError','',true);
				showRegErrorTips('password1Error','',true);
				showRegErrorTips('securityError','',true);
				if(!validDomainName()){
					return;
				}
				if(!confirmNickName()){
					return;
				}
				if(!confirmPass()){
				    return;
				}
				if(!confirmPass1()){
					return;
				}
				
				if(!confirmAnswer1()){
					return;
				}

				if(document.getElementById("DomainNameError").innerHTML != '' && document.getElementById("DomainNameError").innerHTML != '&nbsp;') {
					return ;
				}				
				submitForm('register','../../registerDone.do');
			}
			
			function onChangeEmail() {
				document.getElementById("onChange").style.display = "none";
				document.getElementById("cancelChange").style.display = "";
			}
			
			function cancelChangeEmail() {
				document.getElementById("onChange").style.display = "";
				document.getElementById("cancelChange").style.display = "none";
				var regForm = document.getElementById("register");
				regForm.domainname.value = document.getElementById("regDomainName").value;
				showRegErrorTips('DomainNameError','',true);
			}
			/**
			转换输入对象的值为小写
			@param userObj 要转化为小写的对象
			*/
			function changLower(userObj){
				userObj.value = userObj.value.toLowerCase();
			}
			
			function keyenter(event) {
				if(document.all) var event = window.event;
				if(event.keyCode == '13')
				{
					submitLoginForm();
				}
			}