function DO_openWindow(thelien,winName,width,height,properties) { 
  xP = (screen.width - width) / 2
  yP = (screen.height - height) / 2
  window.open(thelien,winName,'width=' + width + ',height=' + height + properties + 'left=' + xP + ',top=' + yP);
}
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_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

    function getCookieVal (offset) {
      var endstr = document.cookie.indexOf (";", offset);
      if (endstr == -1)
        endstr = document.cookie.length;
      return unescape(document.cookie.substring(offset, endstr));
    }
    function GetCookie (name) {
      var arg = name + "=";
      var alen = arg.length;
      var clen = document.cookie.length;
      var i = 0;
      while (i < clen) {
        var j = i + alen;
        if (document.cookie.substring(i, j) == arg)
          return getCookieVal (j);
        i = document.cookie.indexOf(" ", i) + 1;
        if (i == 0) break; 
      }
      return null;
    }
    function SetCookie (name, value) {
      var argv = SetCookie.arguments;
      var argc = SetCookie.arguments.length;
      var expires = (argc > 2) ? argv[2] : null;
      var path = (argc > 3) ? argv[3] : null;
      var domain = (argc > 4) ? argv[4] : null;
      var secure = (argc > 5) ? argv[5] : false;
      document.cookie = name + "=" + escape (value) +
        ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
        ((path == null) ? "" : ("; path=" + path)) +
        ((domain == null) ? "" : ("; domain=" + domain)) +
        ((secure == true) ? "; secure" : "");
    }
    function DeleteCookie (name) {
      var exp = new Date();
      exp.setTime (exp.getTime() - 1);  // delete cookie
      var cval = GetCookie (name);
      document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
    }
function checkcart(which) {
	if(document.cart.name.value == "") {
		alert('Please enter a contact name. Thank you.');
		document.cart.name.focus();
		return false;
	}
	if(document.cart.add5.value == "") {
		alert('Please enter a postcode or Zip. Thank you.');
		document.cart.add5.focus();
		return false;
	}
	if(document.cart.telephone.value == "") {
		alert('Please enter a contact telephone number. Thank you.');
		document.cart.telephone.focus();
		return false;
	}
	if(document.cart.email.value == "") {
		alert('Please enter your email address. Thank you.');
		document.cart.email.focus();
		return false;
	}
	if(document.cart.confirmemail.value == "") {
		alert('Please re-enter your email address. Thank you.');
		document.cart.confirmemail.focus();
		return false;
	}
	if(document.cart.email.value != document.cart.confirmemail.value) {
		alert('Please check your email address. Thank you.');
		document.cart.confirmemail.focus();
		return false;
	}
return true;
}