// Gaulter Russell JavaScript
// Created 02/04/2004
// Author Jeff Butler

// Add update notes here:

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_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 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_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function openWindow(theURL,winName,features) {
  	window.open(theURL,winName,features).focus();;
}

function jump(sel) {
	var url = sel.options[sel.selectedIndex].value;
	if ( url != '#' ) top.location = url;
}

function checkForm(){
	if (document.bigtree_form.name.value == "") {
		alert("please enter your name."); 
		document.bigtree_form.name.focus();
	} else if (document.bigtree_form.email.value == "") {
		alert("please enter your email address."); 
		document.bigtree_form.email.focus();
	} else if(null == document.bigtree_form.email.value.match(/[a-zA-Z0-9._]+@[a-zA-Z0-9.-_]+/)) {
		alert("please enter a valid email address."); 
		document.bigtree_form.email.focus();
	} else if (document.bigtree_form.comments.value == "") {
		alert("please enter your comments."); 
		document.bigtree_form.comments.focus();
	} else {
	document.bigtree_form.action="mail.php";
	document.bigtree_form.submit();
	}
}

function checkSignup(){
	if (document.bigtree_mailing_list.name.value == "") {
		alert("please enter your name."); 
		document.bigtree_mailing_list.name.focus();
	} else if (document.bigtree_mailing_list.email.value == "") {
		alert("please enter your email address."); 
		document.bigtree_mailing_list.email.focus();
	} else if(null == document.bigtree_mailing_list.email.value.match(/[a-zA-Z0-9._]+@[a-zA-Z0-9.-_]+/)) {
		alert("please enter a valid email address."); 
		document.bigtree_mailing_list.email.focus();
	} else {
	document.bigtree_mailing_list.action="mailing_list.php";
	document.bigtree_mailing_list.submit();
	}
}

function checkKeyword(){
	if (document.bigtree_search.keyword.value == "") {
		alert("please enter a search keyword."); 
		document.bigtree_search.keyword.focus();
	} else {
	document.bigtree_search.action="search.php";
	document.bigtree_search.submit();
	}
}

function printPage() {
  if (window.print)
    window.print()
  else
    alert("Sorry, your browser doesn't support this feature.");
}

function display( id, value )
{
    if ( document.getElementById )
    {
        document.getElementById( id ).style.display = value;
    }
    else if ( document.all )
    {
        document.all[ id ].style.display = value;
    }
}

function hide( id )
{
    display( id, 'none' );
}

function show( id )
{
    display( id, 'block' );
}

windowprops = "top=0,left=0,resizable=no" + ",width=" + screen.width + ",height=" + screen.height + ",fullscreen=yes" + ",scrollbars=no";
function openWindow(theURL,winName,windowprops) {
  	window.open(theURL,winName,windowprops).focus();
}

function form1_onsubmit() {
  // Firstname validation - length > 0 and all alpha
  if (form1.VacID.value == "")
  {
    alert("Please enter a Job Reference number.");
    form1.VacID.focus();
    return (false);
  }

  var checkOK = "0123456789";

  var checkStr = form1.VacID.value;
  var allValid = true;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("The Job Reference number must be a number.\r Please leave out any leading or trailing letters.");
    form1.VacID.focus();
    return (false);
  }
}

function showContent(section){
		ob1 = document.getElementById(section);
		if(ob1.style.display == 'none'){
			ob1.style.display = 'block';
		}else{
			ob1.style.display = 'none';
		}
	}