function cleanSelect(name){
  	$(name).options.length = 0;  	
  }
  
  function setImage(thumb, image, node){
    var a = 'a'+node;
    $(a).href = image;
  	$(node).src = thumb;
  }
  
  function next(){
  	var node = document.getElementById('advert');

  	node.style.backgroundImage = 'url('+ companies[counter][1] +')';
  	node.href = companies[counter][0];
  	node.title = companies[counter][2];
  	
  	if(counter == companies.length - 1){
  		counter = 0;
  	}else{
  		counter++;
  	}
  }