function Photo(filename) {
    this.filename = filename;
}


var allPhotos = new Array(
    new Photo("mont-st-michel.jpg"),
 new Photo("notre-dame.jpg"),
 new Photo("pompidou.jpg"),
 new Photo("versailles.jpg"),
 new Photo("mornas.jpg"),
 new Photo("pont-du-gard.jpg"),
 new Photo("david.jpg"),
 new Photo("vatican.jpg"),
 new Photo("steve-rome.jpg")
 );

var maxWidth  = 600;
var maxHeight = 400;