function check4js() {

    // tune forms
    for ( var i = 0; i < document.forms.length; i++ ) {
        var hiddenForm = document.createElement('input');        
        hiddenForm.type = 'hidden';
        hiddenForm.name = 'js';
        hiddenForm.value = '1';
        document.forms[i].appendChild(hiddenForm);
    }


    // tune links
    for ( var i = 0; i < document.links.length; i++ ) {
        if (
            document.links[i].href.search(/^mailto:/i) != -1
            ||
            (
                document.links[i].href.search(/^(https?:\/\/)?(www\.)?dd24/i) == -1
                &&
                document.links[i].href.search(/^(https?:\/\/)?(www\.)?domaindiscount24/i) == -1
            )
        ) {
            continue;
        }
        if ( document.links[i].href.search(/\?/) != -1 ) {
            document.links[i].href = document.links[i].href.replace(/\?/,'?js=1&');
        } else {
            if ( document.links[i].href.search(/#/) == -1 ) {
                document.links[i].href = document.links[i].href + '?js=1';
            } else {
                document.links[i].href = document.links[i].href.replace(/#/,'?js=1#');
            }
        }
    }
}