function IncludeOpacityCSS() 
{
    document.write('<link href="/css/opacity.css" rel="stylesheet" type="text/css" media="screen" />');
}

function ChangeTabCssClass(color) {
    document.getElementById('ctl00_cp_main_left_tabContainer_body').style.background="url(../images/bg_tabbox" + color + ".gif)";
}

function ClearTextbox(elem) {     
     elem.value = '';
}

function Talk(str) {
    /* .setAttribute() does not work in IE6 and IE7!!! */
    document.getElementById('fieldset_right').style.background="url(../images/kontakt_" + str + ".jpg)";
}