function imgOn(img_name, img_src, racineSite) {
	document.getElementById(img_name).src = racineSite+'/img/common/'+img_src+'_on.gif';
}
function imgOff(img_name, img_src, racineSite) {
	document.getElementById(img_name).src = racineSite+'/img/common/'+img_src+'.gif';
}