var curcontentindex=0
var messages=new Array()

function getElementByClass(classname){
	var inc=0
	var alltags=document.all? document.all : document.getElementsByTagName("*")
	for (i=0; i<alltags.length; i++){
		if (alltags[i].className==classname)
		messages[inc++]=alltags[i]
	}
}

function rotatecontent(){
	//get current message index (to show it):
	curcontentindex=0;				
	//set random to display groups of pics
	var mr = Math.floor(Math.random()*4);	
	//alert(mr)	
	if (mr==0){
		curcontentindex=0;
		//alert("currentindex=0");
		prevcontentindex=0;		
	}else if(mr==1){
		curcontentindex=1;
		//alert("currentindex=1");
		prevcontentindex=0;
	}else if(mr==2){
		curcontentindex=2;	
		//alert("currentindex=2");
		prevcontentindex=1;
	}else{
		curcontentindex=3;	
		//alert("currentindex=3");
		prevcontentindex=2;
	}				
	messages[prevcontentindex].style.display="none" //hide previous message
	messages[curcontentindex].style.display="block" //show current message
}
// on load function is below