// ----------------------- opacity - index cimoldal ---------------------------
var testObj;

function opac(Elem) {
    testObj = eval(document.getElementById(Elem));
	for (var i=0;i<6;i++)
		setTimeout('setOpacity('+i+')',100*i);
	return false;
}

function setOpacity(value)
{
	testObj.style.opacity = value/5;                       
	testObj.style.filter = 'alpha(opacity=' + value*20 + ')';  
}
// opacity 0 -   1 kozt
// filter  0 - 100 kozt