var Cookie = {
  set: function(name, value, daysToExpire) {
    var expire = '';
    if (daysToExpire != undefined) {
      var d = new Date();
      d.setTime(d.getTime() + (86400000 * parseFloat(daysToExpire)));
      expire = '; expires=' + d.toGMTString();
    }
    return (document.cookie = escape(name) + '=' + escape(value || '') + expire);
  },
  get: function(name) {
    var cookie = document.cookie.match(new RegExp('(^|;)\\s*' + escape(name) + '=([^;\\s]*)'));
    return (cookie ? unescape(cookie[2]) : null);
  },
  erase: function(name) {
    var cookie = Cookie.get(name) || true;
    Cookie.set(name, '', -1);
    return cookie;
  },
  accept: function() {
    if (typeof navigator.cookieEnabled == 'boolean') {
      return navigator.cookieEnabled;
    }
    Cookie.set('_test', '1');
    return (Cookie.erase('_test') === '1');
  }
};


function addLoadEvent(func)
{
	var oldonload = window.onload;

	if ( typeof window.onload != "function" )
	{
		window.onload = func;
	}
	else
	{
		window.onload = function()
		{
			oldonload();
			func();
		}
	}
}

function chkEmail(value)
{
	var filter = /^.+@.+\..{2,3}$/;
	
	if ( !filter.test(value) )
	{
		return false;
	}
	
	return true;
}

function chkReferrerForm(theForm)
{
	var errMsg = "";

	if ( theForm.elements[0].value == "" && theForm.elements[3].value == ""  && theForm.elements[6].value == ""  && theForm.elements[9].value == "")
	{
		alert("You haven't entered any friends!");
		return false;
	}

	var mate = 0;

	for ( i=0; i<4; i++ )
	{
		if ( theForm.elements[(i*3)].value != "" )
		{
			if ( !chkEmail(theForm.elements[(i*3)+1].value) )
			{
				errMsg += "- please enter a valid email for mate " + (i+1) + "\n";
			}	
		}
		
		
	}

	if ( errMsg )
	{
		alert("The following errors have occurred:\n" + errMsg);
		return false;
	}

	return true;

}


Array.prototype.in_array = function(search_term) {
  var i = this.length;
  if (i > 0) {
	 do {
		if (this[i] === search_term) {
		   return true;
		}
	 } while (i--);
  }
  return false;
}

function changeImg(changeTo)
{
	document.getElementById("main_img").src = changeTo;
}

String.prototype.wordCount = function () {return this.split(/\b[\s,\.-:;]*/).length}