function pocet(){
    area = document.getElementById('area');
	alength = area.value.length;
	if(alength > 600){
		area.value = area.value.substr(0,600);
		document.getElementById('cislo').innerHTML="max";
		document.getElementById('cislo').style.color="red";
	} else {
		document.getElementById('cislo').innerHTML=alength;
		document.getElementById('cislo').style.color="black";
	}

}