# Option: urlconverter_callback

This option enable you to add your own URL converter logic. This option should contain a JavaScript function name. The format of this converter function is: URLConverter(url, node, on_save). There URL is the URL string to convert, node is the element that contains the URL that is to be converted this parameter may be set to null if there is no element for the URL and on_save is set to true when contents is to be extracted from the editor for example when the user submits the HTML form. This function should return the converted URL as a string. This option is set to a internal TinyMCE function "TinyMCE.prototype.convertURL" by default. You may call this function from your extention inorder to use the built in convert options.

### Example of usage of the urlconverter_callback option:

    function myCustomURLConverter(url, node, on_save) {
    	// Do some custom URL convertion
    	url = url.substring(3);

    	// Return new URL
    	return url;
    }

    tinyMCE.init({
    	...
    	urlconverter_callback : "myCustomURLConverter"
    });