function getp( name )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}

function setCookie(name, value) {
	var expires = new Date();
    expires.setTime(expires.getTime() + 24 * 30 * 60 * 60 * 1000); // sets it for approx 30 days.
	return setCookie(name, value, expires, "/", false);
}

/* This function is used to set cookies */
function setCookie(name,value,expires,path,domain,secure) {
  document.cookie = name + "=" + escape (value) +
    ((expires) ? "; expires=" + expires.toGMTString() : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") + ((secure) ? "; secure" : "");
}

/* This function is used to get cookies */
function getCookie(name) {
    var prefix = name + "=" 
    var start = document.cookie.indexOf(prefix) 

    if (start==-1) {
        return null;
    }
    
    var end = document.cookie.indexOf(";", start+prefix.length) 
    if (end==-1) {
        end=document.cookie.length;
    }

    var value=document.cookie.substring(start+prefix.length, end) 
    return unescape(value);
}

/* This function is used to delete cookies */
function deleteCookie(name,path,domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

function setup(override) {
	/* 	try { */
		var referrer = getp("utm_source");
		if(override)
			referrer = override;
		var campaign = getp("utm_campaign");		
		if(referrer) setCookie("__referrer", referrer); else referrer = getCookie("__referrer");
		if(campaign) setCookie("__campaign", campaign); else campaign = getCookie("__campaign");
		if(referrer == null && document.referrer.indexOf("raveal") < 0) { referrer = document.referrer; setCookie("__referrer", referrer); }
		if(referrer == null) referrer = "";
		if(campaign == null) campaign = "";
		var nodes = Ext.DomQuery.select(".register");
		for(var i = 0; i < nodes.length; i++) {
			if(nodes[i].href) {
				if(nodes[i].href.indexOf("?") > 0)
					nodes[i].href += "&referrer=" + referrer;
				else
					nodes[i].href += "?referrer=" + referrer;
				nodes[i].href += "&campaign=" + campaign
			}
		}
	/* 	} catch(err) {} */

}