Array.max = function( array ){
    return Math.max.apply( Math, array );
};

Array.min = function( array ){
    return Math.min.apply( Math, array );
};

function getSectionsNumArray(){
	var sectionsNumArray = new Array();
	$$("#nav li a").each(function(eli,cnt){	
		if(eli.getProperty("class") != undefined && eli.getProperty("class").contains("sectionbg")){
			var sectionNumTmp = eli.getProperty("class").split(" ").filter(function(eli2,cnt2){
				if(eli2.contains("sectionbg")){
					return eli2;
				}
			})[0].replace(/sectionbg/g,"");
			sectionsNumArray.push(sectionNumTmp);
		}
	});
	
	return sectionsNumArray;
}