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function valideazacnp(cnp) {

  var constanta= "279146358279";

	if(cnp.length!=13) return false;

	var suma=0;

	for(i=0; i<constanta.length; i++) {
		suma=suma+cnp.charAt(i)*constanta.charAt(i);
	}

	var rest=suma%11;

	if((rest <10 && rest == cnp.charAt(12)) || (rest == 10 && cnp.charAt(12) == 1)) {
		return(true);
	}
	else {
		return(false);
	}
}