function switchLang()
{
	var rootname = window.location.pathname;
    var query = window.location.search;
    
    var langdot = ".";
    if(rootname.lastIndexOf("/")>rootname.lastIndexOf(langdot))
    {
    	rootname = rootname + "index.html";
    }
    var suffix = rootname.substring(rootname.lastIndexOf(langdot)+langdot.length, 999);
    rootname = rootname.substring(0, rootname.lastIndexOf(langdot));
    
    langdot = "_fr.";
    window.location.href=rootname + langdot + suffix + query;
}

document.write('<div style="width:120px;"><a href="javascript:switchLang()">Fran&ccedil;ais</a>');
document.write('</div>');