//walidacja formularzy

function passCheck(str)
{			
	var regex=/^[0-9a-zA-Z]+[0-9]{1,9}$/; //^[a-zA-z]+$/
	if (regex.test(str))
		return true;	
	else 
		return false;	
}

function showErr(txt,element)
{              
    if (isElem(element))				
			document.getElementById(element).innerHTML = txt;		
		else
			alert(element);
    return false;
}

function clearMsg(element,class_name)
{   
   collection = document.getElementsByTagName(element);
   len = collection.length;
	 for (i=0; i<len; i++)
	 {
      if (collection[i].className == class_name)
      {
        elem = collection[i].id;
        elem = elem.toString();                        
        document.getElementById(elem).innerHTML = '';
				document.getElementById(elem).style.display = 'none';
      }
   }
}