function change_w(id, pixels) {
     var x = document.getElementById(id);
     x.style.width = x.offsetWidth + pixels + "px";
}

function change_h(id, pixels) {
     var x = document.getElementById(id);
     x.style.height = x.offsetHeight + pixels + "px";
}

function getElementsByName_iefix(tag, name) {
     var elem = document.getElementsByTagName(tag);
     var arr = new Array();
     for(i = 0, iarr = 0; i < elem.length; i++) {
          att = elem[i].getAttribute("name");
          if(att == name) {
               arr[iarr] = elem[i];
               iarr++;
          }
     }
     return arr;

}

function transparentbg(tbg_id) {
     var bak = getElementsByName_iefix("div", tbg_id);
     for(i = 0; i < bak.length; i++) {
          bak[i].style.height = bak[i].parentNode.clientHeight + "px";
          bak[i].style.width  = bak[i].parentNode.clientWidth + "px";
     }
}