function prepareCss(){
// push text aside
    if (document.styleSheets[0].addRule){
        document.styleSheets[0].addRule(".txtContent","text-indent: -6000px;");
                return;
    }
    document.styleSheets[0].insertRule(".txtContent {text-indent: -6000px;}",document.styleSheets[0].cssRules.length);

}