var menuVisibleID, liVisibleID, montagneID = "li_20", merID = "li_21", natureID = "li_22", urbainID = "li_23"; function montrerMenuOF() { document.getElementById(montagneID).className = "Menu1Niveau1_li_hover"; document.getElementById(merID).className = "Menu2Niveau1_li_hover"; document.getElementById(natureID).className = "Menu3Niveau1_li_hover"; document.getElementById(urbainID).className = "Menu4Niveau1_li_hover" } function cacherMenuOF() { document.getElementById(montagneID).className = "Menu1Niveau1_li"; document.getElementById(merID).className = "Menu2Niveau1_li"; document.getElementById(natureID).className = "Menu3Niveau1_li"; document.getElementById(urbainID).className = "Menu4Niveau1_li" };