function selectall(selector){
  if(/^#/.test(selector) && !/\s/.test(selector)){// id
    var getId = selector.replace(/#/,''); 
	  return document.getElementById(getId);
  }else{ // tag ou class  
    if(/\./.test(selector)){// class         
      var context = (/\s/.test(selector))? $(selector.split(/\s/)[0]) : document;   
      var tagOrStyle = (/\s/.test(selector))? selector.split(/\s/)[1] : selector;    
      var styleName = (/^\./.test(tagOrStyle))? tagOrStyle.replace(/\./,'') : tagOrStyle.split(/\./)[1];
      var tagName = (/^\./.test(tagOrStyle))? "*" : tagOrStyle.split(/\./)[0];      
    }else{// tag  
      var context = (/\s/.test(selector))? $(selector.split(/\s/)[0]) : document;   
      var tagName = (/\s/.test(selector))? selector.split(/\s/)[1] : selector;       
    }
    var tagElements = new Array();
    var tag = context.getElementsByTagName(tagName);
    var tag_length = tag.length;
    for (I=0;I<tag_length; I++) {
      if(styleName){
        if(RegExp("(^|\\s)"+styleName+"(\\s|$)").test(tag[I].className)){
          tagElements.push(tag[I]);
        }
      }else{
        tagElements.push(tag[I]);
      }
    }
  return tagElements;
  }
//selectall('#menu'),
//selectall('.item'),
//selectall('ul#menu li'),
//selectall('ul#menu li.item'),
//selectall('#menu .item'),
}

function affiche_collection(obj,obj2) {
	var collections_navs = document.getElementById("COLLECTIONS-NAV");
	var collections_navs_img = collections_navs.getElementsByTagName("img");
	var collection = document.getElementById(obj);
	var collections = selectall('div.COLLECTION')
	for(var i=0 ; i<collections_navs_img.length ; i++) {
		collections_navs_img[i].style.borderColor = "#DFDFDF";
		collections[i].style.display = "none";
	}
	obj2.style.borderColor = "#F0F";
	collection.style.display = "";
}