function login_validate()
{
 var alert_text='';
 if(frm_login.user.value=='') alert_text+='Login name \n';
 if(frm_login.password.value=='') alert_text+='Password \n';
 
 if(alert_text=='') return true;
 else 
	{
	 alert('Following information is missing or incorrect : \n\n'+alert_text);
	 frm_login.user.focus();
	 frm_login.user.select();
	 return false;
	}
}