// JavaScript Document


function changebg(){	

//this calculates a random position to read from the variable bandeaux


random_number= Math.floor(Math.random()* bandeaux.length );

// Loads the  image  based on random number.

currentbandeau="url(images/bandeau/bandeau" + bandeaux[random_number] + ".jpg)"

document.getElementById("bandeau").style.backgroundImage = currentbandeau;
}