function getGETVariable(varName) {
	urlVarsString = document.URL.substr(document.URL.indexOf('?')); // nacte URL od znaku ? dal
	urlMyVarString = urlVarsString.substr(urlVarsString.indexOf(varName)+varName.length+1); // zahodi z neho cast az po varName+'=' 
	varValue = (urlMyVarString.indexOf('&')>0)?(urlMyVarString.substr(0,urlMyVarString.indexOf('&'))):(urlMyVarString); //pokud jsou za tim dalsi promenne, zahodi je to 
	return varValue;
}

mb_urlsubdef_lastdir = '/cmp/' + getGETVariable('mb_cmp');