function changeTab(tabIndex)
{
	var container = $('content-tab-ph');
	var children = $(container).down().childElements('li');
	for (var i = 0; i < children.length; i++)
	{
		var page = $('page_' + i);
		if (page != null)
		{
			children[i].className=children[i].className.replace(new RegExp(" current\\b"), "");	
			children[i].className=children[i].className.replace(new RegExp("current\\b"), "");				
			if (i == tabIndex)
			{
			    if (children[i].className.length != 0)
			    {
				    children[i].className += " current";
				}
				else
				{
				    children[i].className = "current";
				}
				page.style.display = 'block';
			}
			else
			{	
				page.style.display = 'none';
			}
		}
	}
}