/**
 * attach an event to an object.
 * @param obj Object or Node to attach the event
 * @param type Event type to attach
 * @param fn Function name to trigger
 * @version 1.0 build 10.3.2009
 * @author Witali Ott, SP Integration GmbH
 */
function addEvent( obj, type, fn ) {
  if ( obj.attachEvent ) {
    obj['e'+type+fn] = fn;
    obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
    obj.attachEvent( 'on'+type, obj[type+fn] );
  } else
    obj.addEventListener( type, fn, false );
};

/**
 * detach an event from an object.
 * @param obj Object or Node to detach the event
 * @param type Event type to detach
 * @param fn Function name to detach
 * @version 1.0 build 10.3.2009
 * @author Witali Ott, SP Integration GmbH
 */
function removeEvent( obj, type, fn ) {
  if ( obj.detachEvent ) {
    obj.detachEvent( 'on'+type, obj[type+fn] );
    obj[type+fn] = null;
  } else
    obj.removeEventListener( type, fn, false );
}

/**
 * Removes the protocol and hostname from the URL (if present).
 * @param strURL URL to be processed
 * @return strURL without the protocol and host name (starting with the first slash after the //) or simply strURL if no // was found.
 * @version 1.0 build 10.3.2009
 * @author Witali Ott, SP Integration GmbH
 */
function processWebUrl(strURL){
	var pos1 = strURL.indexOf("://");
	if (pos1 > -1) {
		var pos2 = strURL.indexOf("/", pos1 + 3);
		if (pos2 > -1) {
			return strURL.substring(pos2, strURL.length);
		}else{
			return strURL.substring(pos1 + 3, strURL.length);
		}
	}
	else {
		return strURL
	}
}

/**
 * Attach events to all download links in the body tag.
 * This is required to track user activities (WiredMinds, WebTrends, Google Analytics etc.)
 * @version 1.0 build 10.3.2009
 * @author Witali Ott, SP Integration GmbH
 */
function attachAnalyseCode(){
	var objBody = document.getElementsByTagName('body')[0];	
	if (objBody) {
		// get all a-tags nodes and store it in an array
		var arrBodyLinks = objBody.getElementsByTagName('a');
		// loop through all a-tag nodes
		for (var i = 0; i < arrBodyLinks.length; i++) {
			//get download link URI
			var strHref = "";
			strHref = arrBodyLinks[i].getAttribute('href');
			if (strHref != null && strHref.length > 0) {
				// remove protocol and hostname if present
				strHref = processWebUrl(strHref);
				// attach onclick event only to downloads stored in the vwLookupDownloads view
				if (strHref.toLowerCase().indexOf("/vwlookupdownloads/") != -1) {
					if (isWMenabled) {
						// attach WiredMinds tracking code
						addEvent(arrBodyLinks[i], "click", function(){
							this.processedUrl = this.href;
							this.strDLFileName = this.processedUrl.substring(this.processedUrl.lastIndexOf("/") + 1);
							this.strDLFileNameDecoded = decodeURI(this.strDLFileName);
							wiredminds.count(this.strDLFileNameDecoded);
						});
					};
				}
			}
		}
	}
}


/**
 * Triggered by the DomContentLoaded event 
 * IE uses defered loading of a separate script that triggers the autoLoadAnalyseEvent function from "sfrmWebAnalysisWiredMinds" subform
 * @version 1.0 build 11.3.2009
 * @author Witali Ott, SP Integration GmbH
 */
function autoLoadAnalyseEvent(){
	// quit if this function has already been called
	if (arguments.callee.done) return;

	// flag this function so we don't do the same thing twice
	arguments.callee.done = true;
	
	//List any additional functions that should fire on window.onload.
	try{
		attachAnalyseCode();
	}catch(e){}
}



/**
 * This needs to be at the bottom of the lib so that everything else has loaded! 
 * For mozilla browsers, so script doesn't have to wait for all resources to load and can start processing instantly.
 * IE uses defered loading of a separate script that triggers the autoLoadAnalyseEvent function directly from the webpage header
 * @version 1.0 build 11.3.2009
 * @author Witali Ott, SP Integration GmbH
 */
if (document.addEventListener) {
	document.addEventListener("DOMContentLoaded", autoLoadAnalyseEvent, false);
}

/* For all other browsers that doesn't support this. (Non IE/Mozilla/Opera/Safari) */
window.onload=autoLoadAnalyseEvent;