function isemail (s)
								{
								        // Writen by david, we can delete the before code
								        if (s.length > 100)
								        {
								                window.alert("email地址长度不能超过100位!");
								                form.email.focus(); 
								                return false;
								        }
								
								         var regu = "^(([0-9a-zA-Z]+)|([0-9a-zA-Z]+[_.0-9a-zA-Z-]*[0-9a-zA-Z]+))@([a-zA-Z0-9-]+[.])+([a-zA-Z]{2}|net|NET|com|COM|gov|GOV|mil|MIL|org|ORG|edu|EDU|int|INT)$"
								         var re = new RegExp(regu);
								         if (s.search(re) != -1) {
								               return true;
								         } else {
								               window.alert ("请输入有效合法的E-mail地址 ！")
								               return false;
								         }
								}
								function Submit2(){ 
								                form=document.reg2;
										
												
								                if (form.email.value=='') {
								                window.alert ("请输入您的E-mail地址 ！")
								                form.email.focus(); 
								                return false;
								                }
								                if ( !isemail(form.email.value) ) {
								                form.email.focus(); 
								                return false;
								                }
								                
								                if (form.username.value=='') {
								                window.alert ("请输入您的用户名 ！")
								                form.username.focus(); 
								                return false;
								                }
								                 if (form.username.value.length<3) {
								                window.alert ("用户名必须不小于3个字符 ！")
								                form.username.focus(); 
								                return false;
								                }
								                 if (form.username.value.length>15) {
								                window.alert ("用户名不能超过15个字符 ！")
								                form.username.focus(); 
								                return false;
								                }
								                if (form.password.value=='') {
								                window.alert ("请输入您的密码 ！")
								                form.password.focus(); 
								                return false;
								                }
								                if (form.password.value.length<6) {
								                window.alert ("您的密码数必须大于5位 ！")
								                form.password.focus(); 
								                return false;
								                }
								                if (form.passwordyn.value=='') {
								                window.alert ("请输入您的确认密码 ！")
								                form.passwordyn.focus(); 
								                return false;
								                }
								                if (form.password.value!=form.passwordyn.value) {
								                window.alert ("您的密码不一致 ！")
								                form.password.focus();
								                return false;
								                }
								                
		var validateUrl = url + "?email=" + form.email.value + "&userName=" + form.username.value;
        req.open("GET", validateUrl, true);
        req.onreadystatechange = validateCallback;
        req.send(null);

										//form.submit();
									 }
									 
    function validateCallback() {
        if (req.readyState == 4) {
            if (req.status == 200) {
                var node = req.responseXML.getElementsByTagName("message")[0].childNodes[0];
                if(node) {
                    if(node.nodeValue == "valid")
                        reg2.submit();
                    else if(node.nodeValue == "email")
                        alert("E-mail已存在，请选择其他E-mail");
                    else if(node.nodeValue == "userName")
                        alert("用户名已存在，请选择其他用户名");
                    else if(node.nodeValue == "userName,email")
                        alert("用户名已存在，请选择其他用户名\nE-mail已存在，请选择其他E-mail");
                }
            }
        }
    
    }
									 
									 
									 function userreg()
{
	form=document.reg2;
	if (form.usernameemail.checked)
		{
			
			if (form.email.value=="")
				{
				alert("请先输入E-mail");
				form.email.focus();
				form.usernameemail.checked=false;
				return false;
				}
			else
				{
				form.username.value=form.email.value
				form.username.readOnly=true
				}
		}
	else
		{
			form.username.value=""
			form.username.readOnly=false
		}
}