function chk(form)
{
	with(form)
	{
		if(txtUserName.value == '')
		{
			alert('请输入用户名!');
			txtUserName.focus();
			return false;
		}
		else if(txtPassword.value == '')
		{
			alert('请输入密码!');
			txtPassword.focus();
			return false;
		}
		else if(txtRePassword.value == '')
		{
			alert('请输入确认密码!');
			txtRePassword.focus();
			return false;
		}
		else if(txtRePassword.value != txtPassword.value)
		{
			alert('密码不同!');
			txtRePassword.focus();
			return false;
		}
		else if(txtRealname.value == '')
		{
			alert('请输入真实姓名!');
			txtRealname.focus();
			return false;
		}
		else if(txtVcard.value == '')
		{
		    alert('请输入身份证号码!');
		    txtVcard.focus();
		    return false;
		}
		else if(!CheckEmail(txtEmail.value))
	    {
		    alert('电子邮箱地址格式不正确!');
		    txtEmail.focus();
		    return false;
	    }
	    else if(txtAdd.value == '')
	    {
	        alert('请输入通讯地址!');
	        txtAdd.focus();
	        return false;
	    }
	    else if(txtZip.value == '')
	    {
	        alert('请输入邮编!');
	        txtZip.focus();
	        return false;
	    }
	    else if(txtCode.value == '')
	    {
	        alert('请输入入验证码!');
	        txtCode.focus();
	        return false;
	    }
		else
		{
			return true;
		}
	}
}

function CheckEmail(obj)
{
	var pattern = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;
	return (pattern.exec(obj)) ? true : false;
}

function CheckUser(name)
{
    if(name == '')
    {
        alert('请输入用户名');
    }
    else
    {
        var PostData = "do=checkuser&n=" + name;
        //alert(window.location.protocol + "//" + window.location.host + "/ajax.aspx");
        PostRequest(window.location.protocol + "//" + window.location.host + "/ajax.aspx", PostData);
    }
}