var intMax = 0;
var strDiv = "";
var intLast = 0;
var intervalVar;

function customChangeClass(intNext){
	clearInterval(intervalVar);
	
	if(intLast == 0){
		$("#pictureblock").css({backgroundImage: ""});
		$("#" + strDiv + intNext).css({display : "block"});
		$("#li-" + strDiv + intNext).addClass("hover");
	}else{
		$("#" + strDiv + intNext).fadeIn("slow");
		$("#li-" + strDiv + intNext).addClass("hover");
		
		$("#" + strDiv + intLast).fadeOut("slow");
		$("#li-" + strDiv + intLast).removeClass("hover");
	}
	
	intLast = intNext;
		
	intervalVar = setInterval("nextClassAuto()", 5000);
}

function customChangeClassAutomatic(strDivName, intMaxNumber, intRandomNumb){
	intMax = intMaxNumber;
	strDiv = strDivName;
	
	customChangeClass(intRandomNumb);
}

function nextClassAuto(){
	var intNext = intLast + 1;
	
	if(intNext > intMax)
		intNext = 1;
	
	customChangeClass(intNext);
}