function showThis(quin) 
{ 
    if(quin == 1){
        for(i=100; i<103; i++){
            document.getElementById(i).style.display = 'block';
        }
        for(i=200; i<216; i++){
            document.getElementById(i).style.display = 'none';
        }
    }else{
        for(i=100; i<103; i++){
            document.getElementById(i).style.display = 'none';
        }
        for(i=200; i<216; i++){
            document.getElementById(i).style.display = 'block';
        }
        
    }
} 

function changeMainImg(nom)
{

    if(nom == 'portada'){
        var newsrc = 'index.html';
        return window.location.replace(newsrc);
    }else{
        var newsrc = nom + '.html';
        return window.location.replace(newsrc);
    }
    
    document.getElementById('mainimg').src = newsrc;
}