setting Attributes to a link

var oEditor   = window.opener;
var FCK      = oEditor.FCK ;
var FCKConfig   = oEditor.FCKConfig ;
var sLnkUrl;
//sPageType ist n (normal) oder m (marginal)
var sPageType  = "n";
//sLinkType ist e (extern) oder i (intern)
var sLinkType  = "e";
var oRegex = new Object() ;
oRegex.UriProtocol = new RegExp('') ;
oRegex.UriProtocol.compile( '^(((http|https|ftp|sftp):\/\/))', 'gi' ) ;

if (link != null) {
        sLnkUrl  = link;
        sLinkType = "i";
}else {
   sLnkUrl =document.forms.link_form.urlkopf.options[document.forms.link_form.urlkopf.selectedIndex].value + document.forms.link_form.txtUrl.value.replace( oRegex.UriProtocol, '' ) ;
   sLinkType = "e";
}
if (sLnkUrl != null && ((sLinkType == "e" && sLnkUrl.length > 11) || sLinkType == "i")) {
     var oLink = FCK.Selection.MoveToAncestorNode( 'A' ) ;
     var linkClassName = (FCKConfig.PageType=='m')?'linkMargin':'link1e';
     if ( oLink ) {
         FCK.Selection.SelectNode( oLink ) ;
         oEditor.FCKUndo.SaveUndoStep() ;
         oLink.href = sLnkUrl;
       } else {
         oLink = oEditor.FCK.CreateLink( sLnkUrl ) ;
     }
         oLink.setAttribute('class', linkClassName, 0) ;

         // Externe Links in neuem Fenster oeffnen.
         if (sLinkType == "e") {
             oLink.target = "_blank";
         }

     if ( oEditor.FCKBrowserInfo.IsIE ){
            oLink.setAttribute('className', linkClassName, 0) ;
         //FCK.SetHTML( FCK.GetHTML(), true );
     }
     oLink.title = "graphicalButtonLink";
     window.close();
}

 oLink.setAttribute('class', linkClassName, 0) ;

 oLink.target = "_blank";

oLink.title = "graphicalButtonLink";