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_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_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];}
}

function showHideText(box,id)  {  
var elm = document.getElementById(id)  
elm.style.display = box.checked? "block":"none" 
}

function highlight(which,color){
if (document.all||document.getElementById)
which.style.backgroundColor=color
}

function validate_regist(e){

if (e.txtUsername.value <= 0)
{
	alert('username is empty !! please fill in your information');
	e.txtUsername.focus();
	return false;
}

if (e.txtPassword.value <= 0)
{
	alert('password is empty !! please fill in your information');
	e.txtPassword.focus();
	return false;
}

if (e.txtConfirm.value <= 0)
{
	alert('confirm password is empty !! please fill in your information');
	e.txtConfirm.focus();
	return false;
}

if (e.txtEmail.value <= 0)
{
	alert('email is empty !! please fill in your information');
	e.txtEmail.focus();
	return false;
}

}

// Check Email Format

function checkemail(){
var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
var returnval=emailfilter.test(document.getElementById('txtEmail').value)
if (returnval==false){
document.getElementById('valid').src = 'images/x.png'
}
else {
document.getElementById('valid').src = 'images/valid.png'
}
}

//

// Check Number
function check_number() {
e_k=event.keyCode
if (((e_k < 48) || (e_k > 57)) && e_k != 46 ) {
//if (e_k != 13 && (e_k < 48) || (e_k > 57)) {
event.returnValue = false;
alert("ต้องเป็นตัวเลขเท่านั้น กรุณาตรวจสอบข้อมูลของท่านอีกครั้ง...\n(Must be at Number Please enter your information again...)");
}
}

//

// Show Hide //

function showHideMenuNode(node_id, image_id){
	n = document.getElementById(node_id);
	i = document.getElementById(image_id);
	if(n){
		n.style.display = n.style.display == "none" ? "block" : "none";
		if(i){
			i.src = n.style.display == "none" ? "images/menu_tree_plus.gif" : "images/menu_tree_minus.gif";
		}
	}
}

// Close

function startAjax() {
   try { return new ActiveXObject("Msxml2.XMLHTTP");  } catch(e) {} //IE 6 , 7
   try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {} //IE 5 or Above
   try { return new XMLHttpRequest();          } catch(e) {} //Native Javascript 
   alert("XMLHttpRequest not supported");
   return null;
};