var languageKey = "SupplyWEBLanguage";
	function needReloadLanguage(fld){
	    if(! isValidObject(fld.options)){
		    return false;
	    }
	    var cookieLan = getLanguageCookie();
	    if(cookieLan == null){
		setLanguage(fld, "-1");
		return false;
	    }
	    var currentLan = getFormLanguage(fld);
	    if(cookieLan == currentLan){
		return false;
	    }
	    setLanguage(fld, cookieLan);
	    return true;
        }

	function getLanguageCookie(){
	    var lc = document.cookie;
	    var begin = lc.indexOf("; " + languageKey + "=");
	    if(begin == -1){
		begin = lc.indexOf(languageKey + "=");
		if(begin != 0){
			return null;
		}
	    }else{
		begin = begin + 2;
	    }
	    var end = lc.indexOf("; " , begin);
	    if(end == -1){
		end = lc.length;
	    }
	    lan = lc.substring(begin + languageKey.length + 1, end);
	    return lan;
	}

	function getFormLanguage(fld){
	    lanIdx = fld.options.selectedIndex;
	    lan = fld.options[lanIdx].value;
	    return lan;
	}

	function setLanguage(fld, lan){
	    if(lan == null){
		return;
	    }
	    len = fld.options.length;
	    for(i = 0; i< len; i++){
		if(fld.options[i].value == lan){
			fld.options[i].selected = true;
			break;
		}
    	    }
	}

	function saveLanguageToCookie( fld ){
	    lan = getFormLanguage(fld);
            if(lan == -1 ){
		return false;
	    }
            // create an instance of the Date object
            var expires = new Date();
	    // expire in one year
            expires.setTime(expires.getTime() + 365 * 24 * 60 * 60 * 1000);
            //expires.setTime(expires.getTime() + 5* 60 * 1000);
	    
	    document.cookie = languageKey + "=" + lan + "; expires=" + expires.toGMTString(); 
	    return true;
	}	

	function isValidObject(objToTest) {
		if ("undefined" == typeof(objToTest) ) {
			return false;
		}
		if (null == objToTest) {
			return false;
		}
		return true;
	}