function gostergizle(oge)
{
	itm = document.getElementById(oge);
	if (itm.style.display == 'none')
	{
			for (var i=1; i<6; i++)
			{
				var d = 'div_' + i.toString();
				document.getElementById(d).style.display = 'none';
			}

		itm.style.display = '';
	}
	else
	{
		itm.style.display = 'none';
	}
}

function lightup(imageobject, opacity){
    var obj = imageobject.style;
    obj.opacity = (opacity / 100);
    obj.MozOpacity = (opacity / 100);
    obj.KhtmlOpacity = (opacity / 100);
    obj.filter = "alpha(opacity=" + opacity + ")";
}