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];}
}


//table stripes

  function hasClass(obj) {
	 var result = false;
	 if (obj.getAttributeNode("class") != null) {
		 result = obj.getAttributeNode("class").value;
	 }
	 return result;
  }

 function stripe(id) {


	var even = false;


	var evenColor = arguments[1] ? arguments[1] : "#fff";
	var oddColor = arguments[2] ? arguments[2] : "#eee";


	var table = document.getElementById(id);
	if (! table) { return; }

	var tbodies = table.getElementsByTagName("tbody");

	for (var h = 0; h < tbodies.length; h++) {

	  var trs = tbodies[h].getElementsByTagName("tr");

	  for (var i = 0; i < trs.length; i++) {

		if (!hasClass(trs[i]) && ! trs[i].style.backgroundColor) {

		  var tds = trs[i].getElementsByTagName("td");

		  for (var j = 0; j < tds.length; j++) {

			var mytd = tds[j];

			var td_class = hasClass(mytd);
			if ((!td_class || td_class == 'error') && ! mytd.style.backgroundColor) {

			  mytd.style.backgroundColor = even ? evenColor : oddColor;

			}
		  }
		}

		even =  ! even;
	  }
	}
  }


function join_purchase_check(el)
{
	var span = document.getElementById('gift_from_block');
	span.style.visibility = (el.options[el.selectedIndex].value == 'gift') ? 'visible' : 'hidden';
}

function join_type_check(radio)
{
	var text = document.getElementById('extra_members');
	text.disabled = (radio.value != 'family');
}

// use href of anchor to popup
function popup_a(a, win_name, width, height)
{
	var win = window.open(a.href, win_name, "width="+width+",height="+height+",scrollbars=yes,resizeable=yes");
	if (win) {
		win.focus();
	}
	else {
		alert("Please enable popup windows for this site");
	}
}

function show_gallery(a)
{
	popup_a(a, 'gallery', 700, 500);
}