function hideSelect() {
        var selArray=(document.getElementsByTagName)?
                document.getElementsByTagName('SELECT'):
                        ((document.all)?document.all.tags('SELECT'):null);
        if (selArray) {
                for (i=0;i<selArray.length;i++) {
                        if (selArray[i].name!='url') selArray[i].style.visibility='hidden';  
                }
        }
}

function showSelect() {
        var selArray=((document.all)?document.all.tags('SELECT'):null);
        if (selArray) for (i=0;i<selArray.length;i++) selArray[i].style.visibility='visible';
}