dom = (document.getElementById)? true : false;
isMSIE = (document.all)? true : false;
isNN6 = (dom && !document.all)? true : false;
isNN4 = (document.layers)? true : false;
var TimeOut1;

function hide(obj) {
if (isNN4)   document.layers[obj].visibility = "hide";
if (isNN6)   document.getElementById(obj).style.visibility = "hidden";
if (isMSIE && document.all[obj])  document.all[obj].style.visibility = "hidden";}

function show(obj) {
clearTimeout(TimeOut1);
if (isNN4)   document.layers[obj].visibility = "show";
if (isNN6)   document.getElementById(obj).style.visibility = "visible";
if (isMSIE && document.all[obj])  document.all[obj].style.visibility = "visible";}

function chng_col(obj,col) {if (isNN6)   document.getElementById(obj).bgColor = col;  
if (isMSIE && document.all[obj])  document.all[obj].bgColor = col;}

function act(obj){}

function pass(obj){}

function D_hide(obj) {TimeOut1=setTimeout("hide('"+obj+"')",730);}

function D_show(obj) {
clearTimeout(TimeOut1);
hide('services');
hide('customers');
hide('request');
hide('channels');
hide('cards');
hide('partners');
hide('contacts');

show(obj);
}