function NewWindow(img) {
largeur=600;
hauteur=532;
var winl = (screen.width - largeur) / 2;
var wint = (screen.height - hauteur) / 2;
winprops = 'height='+hauteur+',width='+largeur+',top='+wint+',left='+winl+',scrollbars=0,resizable'
win=window.open(img,"BIGIM",winprops);
 if(win.window.focus){win.window.focus();}

}