// johannes added here the necessary functions from register_function.js

// check for ie5 mac
var bugRiddenCrashPronePieceOfJunk = (
    navigator.userAgent.indexOf('MSIE 5') != -1
    &&
    navigator.userAgent.indexOf('Mac') != -1
)

// check for W3CDOM compatibility
var W3CDOM = (!bugRiddenCrashPronePieceOfJunk &&
               document.getElementsByTagName &&
               document.createElement);

// cross browser function for registering event handlers
function registerEventListener(elem, event, func) {
    if (elem.addEventListener) {
        elem.addEventListener(event, func, false);
        return true;
    } else if (elem.attachEvent) {
        var result = elem.attachEvent("on"+event, func);
        return result;
    }
    // maybe we could implement something with an array
    return false;
}

function registerPloneFunction(func) {
    // registers a function to fire onload.
    registerEventListener(window, "load", func);
}

// now the real function:

function scanforlinks() {
    // terminate if we hit a non-compliant DOM implementation
    if (!W3CDOM) { return false; }
	
	contentarea = document.getElementById('content-site');   

    links = contentarea.getElementsByTagName('a');
    for (i=0; i < links.length; i++) {
        if ( (links[i].getAttribute('href'))
             && (links[i].className.indexOf('link-plain')==-1) ) {
            var linkval = links[i].getAttribute('href');

            // check if the link href is a relative link, or an absolute link to
            // the current host.
            if (linkval.toLowerCase().indexOf(window.location.protocol
                                              + '//'
                                              + window.location.host)==0) 
				{
                // absolute link internal to our host - do nothing
            	} 
				
			else if (linkval.indexOf('http:') != 0)
				{
                // do nothing , could be relative internal link, necessary for firefox
            	} 	

			else 
				{
                // we are in here if the link points to somewhere else than our
                // site.
                if ( links[i].getElementsByTagName('img').length == 0 ) 
					{
                    // we do not want to mess with those links that already have
                    // images in them
					
                    //wrapNode(links[i], 'span', 'link-external');
                    // uncomment the next line if you want external links to be
                    // opened in a new window.
                    links[i].setAttribute('target', '_blank');
                	}
            	}
        }
    }
};

registerPloneFunction(scanforlinks);