function shDv(dvid) {var dv=document.getElementById(dvid);if(dv!=null) dv.style.display = "block";}
function SwapHidden(el1,el2) {var el_1=document.getElementById(el1);var el_2=document.getElementById(el2);if(el_1==null||el_2==null) return;if(el_1.style.display=='none'){var el_sh=el_1;var el_hd=el_2;}else{var el_sh=el_2;var el_hd=el_1;}el_sh.style.display='block';el_hd.style.display='none';}
function SwapClass(elid,cls1,cls2) {var el=document.getElementById(elid);if(el==null) return;if(el.className==cls1)el.className=cls2;else el.className=cls1};
function fcs(elid) {var el=document.getElementById(elid);if(el!=null) el.focus();}