function czyscu(AInput)
{
    if (AInput.value == 'userame') {
        AInput.value = '';
        AInput.style.color='#000';
    }
    return true;
}    
  
function czyscp(AInput)
{
    if (AInput.value == '') {

		document.getElementById('ps').style.backgroundImage = "url(images/tlo_inp.gif)";    

    }
    return true;
} 


function zaznacz(FormName, FieldName, CheckValue)
{
	if(!document.forms[FormName])
		return;
	var objCheckBoxes = document.forms[FormName].elements[FieldName];
	if(!objCheckBoxes)
		return;
	var countCheckBoxes = objCheckBoxes.length;
	if(!countCheckBoxes)
		objCheckBoxes.checked = CheckValue;
	else
		// set the check value for all check boxes
		for(var i = 0; i < countCheckBoxes; i++)
			objCheckBoxes[i].checked = CheckValue;
}