function setVisible(obj)
{
	obj = document.getElementById(obj);
	if (obj.style.visibility == 'visible')
	{
	   obj.style.visibility = 'hidden';
	   obj.style.display = 'none';
	}
	else
	{
	   obj.style.visibility = 'visible';
	   obj.style.display = 'block';
	}
}

// clear a populated text field
function clearTextbox(obj, original_text)
{
	if (document.getElementById(obj).value == original_text)
	   document.getElementById(obj).value = "";
} 

// clear a populated text field
function restoreEmptyTextbox(obj, new_text)
{
	if (document.getElementById(obj).value == '')
	   document.getElementById(obj).value = new_text;
} 

// swap fields in a form
function swapTextFields(currentField, newField)
{
	objCurrent = document.getElementById(currentField);
	objNew = document.getElementById(newField);

	objCurrent.style.visibility = 'hidden';
	objCurrent.style.display = 'none';

	objNew.style.visibility = 'visible';
	objNew.style.display = 'block';
	objNew.focus();
 
}