function abrepagina(pagina, id){
	
	
	last = null;
	
	
	if( last != this ){ // let's avoid needless requests
		if(id == null){	var url = 'paginas/' + pagina + '.php'; }else{ var url = 'paginas/' + pagina + '.php?id='+id; }
		
		$('#content').html( '<p id="carregando"><img src="images/carregando.gif" /> <br /> Caregando...</p>' ).load( url, function(){
			this.scrollLeft = 0;//scroll back to the left
		});
		
	}
	
	
	last = this;
	
	return false;
	
}