function TextCounter(fieldId,cntfieldId,maxlimit) {
                var textField = document.getElementById(fieldId); 
                var cntField = document.getElementById(cntfieldId); 
                
if (textField.value.length > maxlimit){ // if too long...trim it!
textField.value = textField.value.substring(0, maxlimit);
cntField.innerHTML = "Remaining characters: 0";
}
// otherwise, update 'characters left' counter
else
    cntField.innerHTML = "Remaining characters: " + parseInt(maxlimit - textField.value.length);
}