function $() {
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1)
      return element;

    elements.push(element);
  }
  return elements;
}

function setColor(color){
$(color_material).style.backgroundColor=color;
}

function imgOver(imageName,img_src) {
 if (document.images&&document.images[imageName]) {document.images[imageName].src = img_src;}
}
function setMaterial(src,title,color,background){
$(view_material).innerHTML="<div class='img_title' style='"+background+" color:"+color+";'>"+title+"</div>";
$(view_material).style.backgroundImage="url("+src+")";
}

function setHeight(id,h){
$(id).height=h;
}



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