function cookie_writeCookie(name, value){
	var argv=cookie_writeCookie.arguments;
	var argc=cookie_writeCookie.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 cookie_getCookieVal(offset){
	var endstr=document.cookie.indexOf (";", offset);
	if (endstr==-1) endstr=document.cookie.length;
		return unescape(document.cookie.substring(offset, endstr));
}

function cookie_readCookie(name){
	value=""
	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 cookie_getCookieVal(j);
			value= cookie_getCookieVal(j);
		}
		i=document.cookie.indexOf(" ",i)+1;
		if (i==0) 
			break;
	}
	return value;
}



var co = "";

function codeOrigine_checkCodeOrigine(){
	codeOrigine = codeOrigine_getURLParam("co");
	if(codeOrigine != "")
	{
		var dieseIdx=codeOrigine.indexOf("#");
		if(dieseIdx!=-1)
			codeOrigine = codeOrigine.substring(0,dieseIdx);
		var date = new Date();
		date.setMonth(date.getMonth()+3);
		cookie_writeCookie("co",codeOrigine,date,"/");
	}
	else{
		codeOrigine = cookie_readCookie("co");
	}
	return codeOrigine;
}


function codeOrigine_getURLParam(strParamName){
  var strReturn = "";
  var strHref = window.location.href;
  if ( strHref.indexOf("?") > -1 ){
    var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase();
    var aQueryString = strQueryString.split("&");
    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
      if (
	aQueryString[iParam].indexOf(strParamName.toLowerCase() + "=") > -1 ){
        var aParam = aQueryString[iParam].split("=");
        strReturn = aParam[1];
        break;
      }
    }
  }
  return unescape(strReturn);
}

co = codeOrigine_checkCodeOrigine();