var tmp=1;

function overEffect(obj, iFile)
{
	obj.style.background = "URL('"+iFile+"')";
	obj.style.cursor = 'pointer';
}

function showTag(tagObj)
{
	if(tmp == 1)
	{
		obja = document.getElementById('begin');
		obja.style.visibility = "hidden";
		tagObj.style.visibility = "visible";
	}
	else
	{
		tmp.style.visibility = "hidden";
		tagObj.style.visibility = "visible";
	}
	tmp = tagObj;
}