مدیاویکی:Gadget-interwiki.js

/**
 * Add arrows on sidebar to compare current page to interlanguage link'd page
 * by [[user:Pathoschild]], based on older script by unknown
 */
function BilingualLink() 
{
    if( mw.config.get('wgNamespaceNumber') != 0) return;
    var doc_url = document.URL;
    var url = '';
    // iterate over all <li>-elements
    for(var j=0; b = document.getElementsByTagName("li")[j]; j++) {
         if(b.className.substring(0,10) == "interwiki-" ) {
               var lang = b.className.substring(10,b.className.length);
               lang = lang.replace(" ", "%20");
               var langSplitResult = lang.split("%20");
               lang = langSplitResult[0];
               if( doc_url.indexOf('?title=') != -1 ) { 
                   var qm  = doc_url.indexOf('&match=');
                   if( qm != -1 ) url = doc_url.substring(0,qm)+"&match="+lang;
                   else url = doc_url+"&match="+lang;
               } else {
                   var qm  = doc_url.indexOf('?');
                   if( qm != -1 ) url = doc_url.substring(0,qm)+"?match="+lang;
                   else url = doc_url+"?match="+lang;
               }
               b.innerHTML = b.innerHTML+"<a href='"+url+"'> &hArr;</a>";
             }
         }
}
 
$(BilingualLink);