//if(idx !==-1) return; //already initialized = supprime dans la version revenu solaire pour changer de menu et réinitialiser

if (!Array.prototype.indexOf)
{
  Array.prototype.indexOf = function(elt /*, from*/)
  {
    var len = this.length;

    var from = Number(arguments[1]) || 0;
    from = (from < 0)
         ? Math.ceil(from)
         : Math.floor(from);
    if (from < 0)
      from += len;

    for (; from < len; from++)
    {
      if (from in this &&
          this[from] === elt)
        return from;
    }
    return -1;
  };
}



var menuSlider=function(){
// usage: onload=”menuSlider.init('menu1','slide1');menuSlider.init('menu2','slide2')” /
var q=8; //delta width
var i=8; //delta time interval (ms)

var sliders=[]; //all share the sam idx;
var ms=[];
var intervals=[];
return{
init:function(menu,slider){
var g=document.getElementById(slider);
var idx = sliders.indexOf(g);
//if(idx !==-1) return; //already initialized

sliders.push(g); idx=sliders.length-1;

var menu_items=document.getElementById(menu).getElementsByTagName('li');
ms[idx]=menu_items[0];
for(var i=0, L=menu_items.length;i<L;i++){
var c=menu_items[i]; if(c.value==1){ms[idx]=c;}
c.onmouseover=function(){menuSlider.mo(this, idx)}; c.onmouseout=function(){menuSlider.mo(ms[idx], idx)};
c.onmousedown=function(){ms[idx]=this;return false};
}
g.style.width=ms[idx].offsetWidth+'px';
g.style.left =ms[idx].offsetLeft +'px';
},
mo:function(d,idx){
clearInterval(intervals[idx]);
var el,ew; el=parseInt(d.offsetLeft); ew=parseInt(d.offsetWidth);
intervals[idx]=setInterval(function(){menuSlider.mv(el,ew,idx)},i);
},
mv:function(el,ew,idx){
var g=sliders[idx];
var l,w; l=parseInt(g.offsetLeft); w=parseInt(g.offsetWidth);
if(l!==el||w!==ew){
if(l!=el){var ld,lr,li; ld=(l>el)?-1:1; lr=Math.abs(el-l); li=(lr<q)?ld*lr:ld*q; g.style.left =(l+li)+'px'}
if(w!=ew){var wd,wr,wi; wd=(w>ew)?-1:1; wr=Math.abs(ew-w); wi=(wr<q)?wd*wr:wd*q; g.style.width=(w+wi)+'px'}
}else{clearInterval(intervals[idx])}
}};}();