document.getElementsByClassName = function(v){
    var e=document.getElementsByTagName("*"),f=[],className;
    for(var i in e){
        if (i == 'length' || e[i] === undefined) continue;
        //console.log(e.i);
        className = e[i].className;
        if(new RegExp("\\b"+v+"\\b").test(className)){
            f.push(e[i]);
        }
    }
    return f;
}

var elm = document.getElementsByClassName('wtbdy');
for (var i=0; i<elm.length; i++){
  if (document.URL.substr(0,50) != 'http://affiliate.webtrader.cz/affiliates/panel.php'){
    var img = elm[i].getElementsByTagName('img');
    if (img[0]!=undefined) {
        elm[i].style.height=img[0].height+"px";
        elm[i].style.width=img[0].width+"px";
        elm[i].height=img[0].height;
        elm[i].width=img[0].width;
    }
  } else {
    var small = elm[i].getElementsByClassName('wtaddsmall');
    for (var j=0; j<small.length; j++){
      small[j].style.display = 'none';
    }
  }
}

var styles = document.styleSheets;
var styleLib = "http://www.webtrader.cz/affil/advert.css";
var stOK = 0;
for (var i = 0; i < styles.length; i++) {
  if (styles[i].href == styleLib) {
    stOK = 1;
    break;
  }
}

if (stOK == 0) {
  var style = document.createElement("link");
  style.setAttribute("rel", "stylesheet");
  style.setAttribute("type", "text/css");
  style.setAttribute("href", styleLib);  
  document.getElementsByTagName("head")[0].appendChild(style);
}