b2bStr = new Array();
  
var page=0;
var maxPage=6;
var speed=3000;

function showPage(id){
    var b2bContent=document.getElementById("b2bContent");
	page=id;
	b2bContent.innerHTML=b2bStr[id];
	checkBt();	
}
function turnPage(){
	showPage(page);
	theTimer=setTimeout("turnPage()", speed);
	page++;
	if(page>=maxPage) page=0;
}
function checkBt(){
	for(var i=0;i<maxPage;i++){
		btObj=eval('document.getElementById("bt'+i+'")');
		if(page==i){btObj.style.color='#FFFFFF';btObj.style.backgroundColor='#990000';}
		else{btObj.style.color='#FFFFFF';btObj.style.backgroundColor='Gray';}
	}
}