Problems with change of dialogues

hello

first sorry for my english :)

When implemented in an existing system , I have two problems . I hope to get the crucial tip to solve here .

So far, the plugin "link" and " image2 " have been adjusted accordingly in the source code . Now I want to make the changes within CKEDITOR.on( 'dialogDefinition', function (ev )

problems :

1. The language files from the plugin embed - I 've tried using

        var commonlang = ev.lang.common,
            linklang = ev.lang.link;

but does not work . How to call here the necessary data ?

2. The cms itself calls defined function-names to take over url 's . The functions of this I wrote previously in the dialog.js by the plugin.
But if I write the functions now within CKEDITOR.on ('dialogDefinition', function (ev ) , they are not global. In the global scope but I can not write because two different functions have the same name. Names change I can not , because it is so in the system.
How can I solve that?

example in dialog.js (works):

.....
});// end dialog.js

//my Functions
function insertFileLink(link) {
	jQuery('.rex-url input').val("/" + link);
}

function getParam(variable){ 
     var query = window.location.search.substring(1);  
     var vars = query.split("&"); 
      for (var i=0;i<vars.length;i++) {   
            var pair = vars[i].split("=");  
            if(pair[0] == variable){return pair[1];}
       }       return(false);
}

example in dialogDefinition (does not work):

jQuery(document).ready(function($) {

   CKEDITOR.on('dialogDefinition', function(ev) {

        var dialogName = ev.data.name;
        var dialogTabs = ev.data.definition;

        if (dialogName == 'image2') {

            imagefunc = true;

            var infoTab = dialogTabs.getContents('info');

            var src = infoTab.get('src');
            src['className'] = 'rex-url';

            infoTab.add({
                type: 'button',
                id: 'medialink',
                label: 'Medienpool Link',
                align: 'center',
                style: 'display:inline-block;margin-top:14px;',
                onClick: function() {
                    openMediaPool('TINY');
                }
            });

            function insertFileLink(link) {
                jQuery('.rex-url input').val("/" + link);
            }

            function getParam(variable) {
                var query = window.location.search.substring(1);
                var vars = query.split("&");
                for (var i = 0; i < vars.length; i++) {
                    var pair = vars[i].split("=");
                    if (pair[0] == variable) {
                        return pair[1];
                    }
                }
                return(false);
            }
        }//endif
    });
});

I hope you understand what I mean :)