function Onload(){
	var randomnumber = Math.ceil(Math.random()*5);
	
	var showDivId;
	
	switch (randomnumber){
		case 1:
				showDivId="divNumber1";
			break;
			
		case 2:
				showDivId="divNumber2";
			break;
			
		case 3:
				showDivId="divNumber3";
			break;
			
		case 4:
				showDivId="divNumber4";
			break;
			
		case 5:
				showDivId="divNumber5";
			break;
			
		default:
			showDivId="divNumber1";
			break;
			
	}
	
	
	var showDiv = document.getElementById(showDivId);
	showDiv.style.display="";
	
}
function changeDisplay(divId){
	var divN1 = document.getElementById("divNumber1");
	var divN2 = document.getElementById("divNumber2");
	var divN3 = document.getElementById("divNumber3");
	var divN4 = document.getElementById("divNumber4");
	var divN5 = document.getElementById("divNumber5");
	
	divN1.style.display = "none";	
	divN2.style.display = "none";	
	divN3.style.display = "none";	
	divN4.style.display = "none";	
	divN5.style.display = "none";	 
	
	var showDiv = document.getElementById(divId);
	
	showDiv.style.display = "";
}