function switch_TL_on(idname){document.getElementById(idname).className = "top_L02_on";} 
 function switch_TL_off(idname){document.getElementById(idname).className = "top_L02_off";}
 
 function switch_TR_on(idname){document.getElementById(idname).className = "top_R02_on";} 
 function switch_TR_off(idname){document.getElementById(idname).className = "top_R02_off";}
 
 function switch_BL_on(idname){document.getElementById(idname).className = "bottom_L02_on";} 
 function switch_BL_off(idname){document.getElementById(idname).className = "bottom_L02_off";}
 
 function switch_BR_on(idname){document.getElementById(idname).className = "bottom_R02_on";} 
 function switch_BR_off(idname){document.getElementById(idname).className = "bottom_R02_off";}