function setproperty(id,value,initvalue){
if(document.getElementById(id).style.height == value){
document.getElementById(id).style.height = initvalue;
}else{
document.getElementById(id).style.height = value;
}
}

function setproperty2(id,value){
document.getElementById(id).style.height = value;
}

function setproperty3(id,value){
document.getElementById(id).style.height = value;
}

function click1(){
setproperty('rubriques','170px','0px'), setproperty2('archives','0px'), setproperty3('liens','0px');
}
function click2(){
setproperty('archives','170px','0px'), setproperty2('rubriques','0px'), setproperty3('liens','0px');
}
function click3(){
setproperty('liens','170px','0px'), setproperty2('archives','0px'), setproperty3('rubriques','0px');
}