function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

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];}
}

function PopupScreenCentre(url,name,width,height,scrollbars) {
	var titleBarHeight, windowBorderWidth
	titleBarHeight = 24
	windowBorderWidth = 4

	var screenWidth, screenHeight
	screenWidth = 800
	screenHeight = 600

	if (window.screen) {
		if (window.screen.availWidth) {
			// ok browser has the appropriate properties we need to centre it
			screenWidth = window.screen.availWidth
			screenHeight = window.screen.availHeight
		}
	}

	// allow height to auto-shrink to fit screen
	if (height > screenHeight) {
		height = screenHeight - titleBarHeight - windowBorderWidth
		scrollbars = 1
	}

	var windowWidth = windowBorderWidth + width + windowBorderWidth
	var windowHeight = titleBarHeight + height + windowBorderWidth

	var left = (screenWidth - windowWidth) / 2
	var top = (screenHeight - windowHeight) / 2

	window.open(url,name,'left='+left+',top='+top+',screenX='+left+',screenY='+top+',width='+width+',height='+height+',scrollbars='+scrollbars+',resizable=0,toolbar=0,location=0,directories=0,status=0,menubar=0,copyhistory=0')
}

function IsEmail(str) {
	// check if the string is a valid email address
	var tAtPos;
	var tDotPos;
	var tLastDotPos;
	//
	tAtPos = str.indexOf("@");
	tDotPos = str.indexOf(".");
	tLastDotPos = str.lastIndexOf(".");
	//  Must be an @ symbol and a period somewhere there
	if (tAtPos == -1) return false
	if (tDotPos == -1)  return false
	//  No double @@ or ..
	if (str.indexOf("..") != -1 )  return false
	if (str.indexOf("@@") != -1 )  return false
	if (str.indexOf("@.") != -1 )  return false
	if (str.indexOf(".@") != -1 )  return false
	//  Only one @ allowed
	if (str.indexOf("@", tAtPos+1) != -1 )  return false
	//  No spaces allowed
	if (str.indexOf(" ") != -1 )  return false
	//  No leading @ or . allowed
	if (tAtPos == 0 || tDotPos == 0)  return false
	//  The last . must be after the @
	//  And must be text between the last . and the @
	if (tLastDotPos < tAtPos+2)  return false
	//  Must be 2 or 3 or 4 letters behind the last .
	if ((str.charAt(str.length-3) != ".") && (str.charAt(str.length-4) != ".") && (str.charAt(str.length-5) != "."))  return false
	//  All good.
	return true;
}