add: img.setAttribute('kupu-src') = url; 
context:     this.createImage = function(url, alttext, imgclass) {        /* create an image */        var img = this.editor.getInnerDocument().createElement('img');        img.src = url;        img.removeAttribute('height');        img.removeAttribute('width');        if (alttext) {            img.alt = alttext;        };        if (imgclass) {            img.className = imgclass;        };        this.newNode('IMG', img);        return img;    };
meta: 2380	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2380/3ad597531f8a36647c11a2b37126012cc116fc5b/kupubasetools.js/clean/kupu/common/kupubasetools.js