var currDisplayBlock=null;
var blockCount=0;

/******* Rotate display of div content named displayBlockX *********/
function rotate(type) {
	$('#displayBlock'+currDisplayBlock).hide();
	var el;
	
	if(type=='next'){
	    currDisplayBlock++;
	    el=$('#displayBlock'+currDisplayBlock);
	
	    if(!el.get(0)){
	      currDisplayBlock=0;
	      el=$('#displayBlock0');
	    }
	}
	
	if(type=='prev'){
	 currDisplayBlock--;
	 el=$('#displayBlock'+currDisplayBlock);
	 
	 if(!el.get(0)){
	   currDisplayBlock=blockCount-1;
	   el=$('#displayBlock'+currDisplayBlock);
	 }
	}
	
	el.fadeIn(800);
}

$(function(){
	blockCount=$('.canBeDisplayed').length;
	if(blockCount){
	  currDisplayBlock=$('.canBeDisplayed:visible').attr('id').substr(12);
	  news_timer_id=window.setInterval("rotate('next')",20000);
	}
});