function lich(){
var stroka;
var len;

stroka = document.getElementById('comment').value;
len = stroka.length;
document.getElementById('lich').innerHTML=null;
document.getElementById('lich').innerHTML=len;
if (len > 700) {
document.getElementById('lich').innerHTML='<font color="red">'+ document.getElementById('lich').innerHTML +'</font>';
document.getElementById('submit').disabled=true;
               }
else {
document.getElementById('lich').innerHTML=len;
document.getElementById('submit').disabled=false;
     }              
}

function cl(){
 document.getElementById("comment").value="";
document.getElementById('lich').innerHTML="0";
}