function toggleElementDisplayById(DivName)
{ 
    if (!document.getElementById) return;

	with (document.getElementById(DivName).style) 
	{
		if (display == 'none' || display == '')
			display = 'block';
		else 
			display = 'none';
	}
}

function addClassToTag( tag, newClass )
{
	tag.className = tag.className + " " + newClass;
}

function removeClassFromTag( tag, remClass )
{
	var tmp = tag.className;
	tmp = tmp.replace(remClass, "");
	tag.className = tmp;

}