// JavaScript Document

 
  		var num_of_tabs=3; 
  		var current_tab=0;
		var current_tab_id="new_stories_tab"+current_tab;
		var current_content_id="carousel"+current_tab;
		
		//number of seconds
		var timer_seconds=5;
		
		function changeTab(id,flag){
			//change current tab to off
			$(current_tab_id).removeClassName("new_stories_tab_on");
			$(current_tab_id).addClassName("new_stories_tab_off");
			
			//hide current content
			$(current_content_id).addClassName("display_none");
			
			//change current tab and content to new tab clicked
			current_tab_id="new_stories_tab"+id;
			current_content_id="carousel"+id;
			current_tab=id;
			
			
			//turn on clicked tab
			$(current_tab_id).removeClassName("new_stories_tab_off");
			$(current_tab_id).addClassName("new_stories_tab_on");
			
			//show new content
			$(current_content_id).removeClassName("display_none");
			
			if(flag==1){
				clearTimeout(time_out);
			}
		}
		
		function changeTabOnTimer(){
			
			if(current_tab==(num_of_tabs-1)){
				changeTab(0,0);
			}else{
				changeTab(current_tab+1,0);
			}
			time_out=setTimeout("changeTabOnTimer()",timer_seconds*1000);
		
		}
		
		var time_out=setTimeout("changeTabOnTimer()",timer_seconds*1000);