var delay=6000
var ie4=document.all
var curindex=0
var totalcontent=0

function get_total(){
	if (ie4){
		while (eval("document.all.content"+totalcontent))
		totalcontent++
		}
	else{
		while (document.getElementById("content"+totalcontent))
		totalcontent++
		}
}


function contract_all(){
	for (y=0;y<totalcontent;y++){
		if (ie4)
		eval("document.all.content"+y).style.display="none"
	else
		document.getElementById("content"+y).style.display="none"
	}
}


function expand_one(which){
	contract_all()
		if (ie4)
		eval("document.all.content"+which).style.display=""
	else
		document.getElementById("content"+which).style.display=""
}


function rotate_content(){
	get_total()
		contract_all()
		expand_one(curindex)
		curindex=(curindex<totalcontent-1)? curindex+1: 0
		setTimeout("rotate_content()",delay)
}


window.onload=rotate_content