function randomBackground(){
	var ran_number= Math.round(Math.random()*8);
	var aBg = new Array("01.jpg","02.jpg","03.jpg","04.jpg","05.jpg","06.jpg","07.jpg","08.jpg","09.jpg");
	document.getElementById("mainTable").style.backgroundImage = "url(images/bg/" + aBg[ran_number] + ")";
}
function expandOrHide(sec){
	
	var thisSec = document.getElementById(sec);
	for(i=1;i<=5;i++){
		document.getElementById("route"+i).style.display = 'none';
	}
	thisSec.style.display = '';
}