var ticker_layer = false ;
	var step_time = 0 ;
	var freeze_time = 2000 ;
	var news_index = 0 ;
	var title_index = 0 ;
	var end_title = "_" ;
	var title_max_size = 62 ;
	var pause = false ;
	var freeze_timeout_id ;
	var step_timeout_id ;
	var step_char_length = 1 ;
	

	function begin_roll_ticker(){

		prepare() ;
		window.setTimeout( "roll_ticker()" , step_time ) ;
	}	
	
	function prepare(){

		var container_size = 475 ;
		for ( var i = 0 ; i < news.length - 1 ; i++ ){
			t = news[i][0] ;
			t = t.replace(/\&quot;/gi,'"');
			t = t.replace(/\&amp;/gi,'&');
			t = t.replace(/\'/gi,'\'');
	
			var dummy = document.createTextNode( t ) ;
			document.getElementById('dummy').appendChild( dummy ) ;
			var size = document.getElementById('dummy').offsetWidth ;
			
			while( size > container_size ){
				t = t.substring( 0 , title_max_size ) ;
				t = t.substring( 0 , t.lastIndexOf( ' ' ) ) ;
				t += '...';
	
				clear_element( 'dummy' ) ;
				var dummy = document.createTextNode( t ) ;
				document.getElementById('dummy').appendChild( dummy ) ;
				size = document.getElementById('dummy').offsetWidth ;
			}
			clear_element( 'dummy' ) ;
			news[i][0] = t ;
		}
	}
	
	function clear_element( name ){
		/* esvaziar dummy */
		if ( document.getElementById( name ) ){
			while ( document.getElementById( name ).lastChild != null ){
				child = document.getElementById( name ).lastChild ;
				document.getElementById( name ).removeChild( child ) ;
			}
		}
	}
	
	function move_next(){
		if ( title_index == 0 ){
			// índice de notícias já está na posição certa, apenas dar play
			freeze_timeout_id = window.setTimeout( "roll_ticker()" , t ) ;
		}
		else{
			title_index = 0 ;
			next_line(0) ;
		}
	}
	
	function move_prev(){
		if ( title_index == 0 ){
			// índice de notícias já foi movido; corrigir
			news_index == 0 ? news_index = news.length - 2 : news_index-- ;
			prev_line(0) ;
		}else{
			title_index = 0 ;
			prev_line(0) ;
		}
	}
	
	function fill_line(){
		step_char_length = news[news_index][0].length - title_index ;
		step_timeout_id = window.setTimeout( "roll_ticker()" , step_time ) ;
	}
	
	function t_next( obj ){
		pause = false ;
		freeze_timeout_id = window.clearTimeout( freeze_timeout_id ) ;
		step_timeout_id = window.clearTimeout( step_timeout_id ) ;
		step_timeout_id = window.setTimeout( 'move_next()' , step_time ) ;
	}
	
	function t_prev( obj ){
		pause = false ;
		freeze_timeout_id = window.clearTimeout( freeze_timeout_id ) ;
		step_timeout_id = window.clearTimeout( step_timeout_id ) ;
		step_timeout_id = window.setTimeout( 'move_prev()' , step_time ) ;
	}
	
/*	function t_pause( obj ){
		pause = !pause ;
		if ( pause ){
			// limpar timeout se uma notícia já estiver presente
			if ( title_index == 0 && freeze_timeout_id ){
				window.clearTimeout( freeze_timeout_id ) ;
			}else{
				window.clearTimeout( step_timeout_id ) ;
				step_timeout_id = window.setTimeout( "fill_line()" , step_time ) ;
			}
		}else{
			if ( title_index == 0 ){
				next_line(0) ;
			}
		}
	}*/
	
	function roll_ticker(){
		prepare() ;
		
		var title ;
		if ( title_index == 0 ){
			while ( document.getElementById('ticker').lastChild != null ){
				child = document.getElementById('ticker').lastChild ;
				document.getElementById('ticker').removeChild( child ) ;
			}
		}
	
		if ( news_index < news.length + 2 && news[news_index][0].length >= title_index ){
			title = news[ news_index ] ;
			
			document.getElementById('ticker_anchor').setAttribute( "href" , title[1] ) ;
			

			if ( news_index == 0 != "undefined" ){
				document.getElementById('ticker_anchor').setAttribute( "target" , "_blank" ) ;
				document.getElementById('ticker_anchor').style.color = "#000000" ;
			}else{
				document.getElementById('ticker_anchor').setAttribute( "target" , "_parent" ) ;
				document.getElementById('ticker_anchor').style.color = "#cc3300" ;
			}
		
			s_text = title[0].substring( title_index , title_index + step_char_length ) ;
			title_index += step_char_length ;
			
			if ( step_char_length > 1 ){
				step_char_length = 1 ;
			}
			
			if ( document.getElementById('ticker').lastChild != null ){
				if ( document.getElementById('ticker').lastChild.nodeValue == "_" ){
					child = document.getElementById('ticker').lastChild ;
					document.getElementById('ticker').removeChild( child ) ;
				}
			}
		
			txt = document.createTextNode( s_text ) ;
			document.getElementById('ticker').appendChild( txt ) ;
			
			if ( title[0].length > title_index ) {
				if ( title_index % 10 != 0 ){
					txt = document.createTextNode( "_" ) ;
					document.getElementById('ticker').appendChild( txt ) ;
				}
			}
			
			step_timeout_id = window.setTimeout( "roll_ticker()" , step_time ) ;
		}else{
			title_index = 0 ;
		
			if ( !pause ){
				next_line( freeze_time ) ;
			}
		}
	}
	
	function next_line( t ){
		news_index >= news.length - 2 ? news_index = 0 : news_index++ ;
		freeze_timeout_id = window.setTimeout( "roll_ticker()" , t ) ;
	}
	
	function prev_line( t ){
		news_index == 0 ? news_index = news.length - 2 : news_index-- ;
		freeze_timeout_id = window.setTimeout( "roll_ticker()" , t ) ;
	}