function checkSubmit() 
{
	if( !checkID(loginForm.UserName.value)) 
	{
		return false;
	}
	
	if( !document.loginForm.Password.value ) 
	{
		alert( '请填写密码!' );
		document.loginForm.Password.focus();
		return false;
	}  
	if( loginForm.Password.value.length < 6 || loginForm.Password.value.length > 13 ) 
	{
		alert( '密码长度应大于6小于13.' );
		document.loginForm.Password.focus(); 
		return false;
	}
	return true;
}