function randomImg(){

   document.getElementById('bg-img').style.background = "url(http://www.cegeptr.qc.ca/templates/f8d7ae7b-4c5e-41cb-9209-df7fbc715d28/images/<!--K.Params.imgFond-->/image" + Math.round(Math.random()*9+1) + ".jpg) no-repeat top center";

}


function randomImgDiablos(){
   document.getElementById('bg-img').style.background = "url(http://diablos.cegeptr.qc.ca/public/c05bd95d-be51-464c-809e-53ac696c79a3/background/background" + Math.round(Math.random()*9+1) + ".jpg) no-repeat top center #000000";

}