(function(window) {
    
    /*
        Developed by Robert Nyman, http://www.robertnyman.com
        Code/licensing: http://code.google.com/p/getelementsbyclassname/
    */  
    var getElementsByClassName = function (className, tag, elm){
        if (document.getElementsByClassName) {
            getElementsByClassName = function (className, tag, elm) {
                elm = elm || document;
                var elements = elm.getElementsByClassName(className),
                    nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
                    returnElements = [],
                    current;
                for(var i=0, il=elements.length; i<il; i+=1){
                    current = elements[i];
                    if(!nodeName || nodeName.test(current.nodeName)) {
                        returnElements.push(current);
                    }
                }
                return returnElements;
            };
        }
        else if (document.evaluate) {
            getElementsByClassName = function (className, tag, elm) {
                tag = tag || "*";
                elm = elm || document;
                var classes = className.split(" "),
                    classesToCheck = "",
                    xhtmlNamespace = "http://www.w3.org/1999/xhtml",
                    namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
                    returnElements = [],
                    elements,
                    node;
                for(var j=0, jl=classes.length; j<jl; j+=1){
                    classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
                }
                try {
                    elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
                }
                catch (e) {
                    elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
                }
                while ((node = elements.iterateNext())) {
                    returnElements.push(node);
                }
                return returnElements;
            };
        }
        else {
            getElementsByClassName = function (className, tag, elm) {
                tag = tag || "*";
                elm = elm || document;
                var classes = className.split(" "),
                    classesToCheck = [],
                    elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
                    current,
                    returnElements = [],
                    match;
                for(var k=0, kl=classes.length; k<kl; k+=1){
                    classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
                }
                for(var l=0, ll=elements.length; l<ll; l+=1){
                    current = elements[l];
                    match = false;
                    for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
                        match = classesToCheck[m].test(current.className);
                        if (!match) {
                            break;
                        }
                    }
                    if (match) {
                        returnElements.push(current);
                    }
                }
                return returnElements;
            };
        }
        return getElementsByClassName(className, tag, elm);
    };
    
    var elements = getElementsByClassName('scribd_iframe_embed', 'iframe');
    var length = elements.length;
    
    // Set the height for auto-height elements
    for(var i = 0; i < length; i++) {
        var el = elements[i];
        if(el.getAttribute('data-auto-height') === 'true' && el.getAttribute('data-auto-resized') !== 'true') {
            var aspect_ratio = 1 / el.getAttribute('data-aspect-ratio');
            if (aspect_ratio === Infinity) {
              aspect_ratio = 1;
            }
            var height = Math.round(el.clientWidth * aspect_ratio) + 25;
            el.style.height = height + "px";
            el.setAttribute('data-auto-resized', 'true');
        }
    }

    var isIE = function() {
      if(document.styleSheets.length === 0) {
        document.getElementsByTagName('head')[0].appendChild(document.createElement('style'));
      }
      return !document.styleSheets[0].insertRule
    }

    if(isIE()) {
      //starting with 2nd iframe...
      for(var i = 1; i < length; i++) {
        elements[i].src = "http://s4.scribdassets.com/4gen/ie_embed_error.html";
      }
    }
    
})(window);