function ns(){ 
if(document.layers){ 
document.layers['bookFormLayer'].visibility ='hide'} 
} 

var checkEnter=0;
//alert (checkEnter);
function showLayer(){ 

if (document.getElementById){ 
document.getElementById('bookFormLayer2').style.display ='none'} 
else if(document.all){ 
document.all['bookFormLayer2'].style.display ='none'} 
else if(document.layers){ 
document.layers['bookFormLayer2'].display ='none'} 

if (document.getElementById){ 
document.getElementById('bookFormLayer').style.display ='block'} 
else if(document.all){ 
document.all['bookFormLayer'].style.display ='block'} 
else if(document.layers){ 
document.layers['bookFormLayer'].display ='block'} 


document.frmLogin.loginId.focus();
checkEnter=1;
javascript:keyhandler();
} 

function showLayerLoginForMessage(){ 
if (document.getElementById){ 
document.getElementById('bookFormLayer').style.display ='block'} 
else if(document.all){ 
document.all['bookFormLayer'].style.display ='block'} 
else if(document.layers){ 
document.layers['bookFormLayer'].display ='block'} 
document.frmLogin.loginId.focus();
} 


//window.onload = ns; 


function hideLoginLayer(){ 
if (document.getElementById){ 
document.getElementById('bookFormLayer').style.display ='none'} 
else if(document.all){ 
document.all['bookFormLayer'].style.display ='none'} 
else if(document.layers){ 
document.layers['bookFormLayer'].display ='none'}  

if (document.getElementById){ 
document.getElementById('bookFormLayer2').style.display ='block'} 
else if(document.all){ 
document.all['bookFormLayer2'].style.display ='block'} 
else if(document.layers){ 
document.layers['bookFormLayer2'].display ='block'} 


checkEnter=0;

} 



document.onkeypress = keyhandler;
function keyhandler(e) {
	if(checkEnter==1){
  var event = e ? e : window.event;
		if (event.keyCode == 13) { 
		//document.frmLogin.confirm.onClick=1;
		//alert('a');
		//document.frmLogin.submit();
		return validationLogin();
		
		
		
		
		}
	}
}

//alert (document.onkeypress);




function validationLogin() {
  //var emailFormat = /^\w+\@\w+\.\w{3}$/
  //var emailFormat = /^b\[A-Z0-9._%-]+\@[A-Z0-9.-]+\.[A-Z]{2,4}\b$/
  var emailFormat = /^[\n <"']*([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+)$/
  var passwordFormat = /^\w{6,12}$/
  var oneCharFormat = /^\w{1}$/
  var fourDigitFormat = /^\d{4}$/

  if (document.frmLogin.loginId.value == "" || (!emailFormat.test(document.frmLogin.loginId.value))) {/*search for @ and end with .xxx*/
  	alert("請輸入正確的電郵");
	document.frmLogin.loginId.focus();
	return false;
  }
  if (document.frmLogin.password.value == "" || (!passwordFormat.test(document.frmLogin.password.value))) {
  	alert('請輸入至少6個字元的密碼');
	document.frmLogin.password.focus();
	return false;
  }
   document.frmLogin.submit();
  
}



//popup window scripts
var win = null;
function NewWindow(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
win = window.open(mypage,myname,settings)
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
	if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
	obj.visibility=v; }
}



<!--
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
//-->