Acrobat User Community Forums

This solution is offered for an AcroForm (Acrobat Form). The code can be modified for a LiveCycle form. As for as the visual character counter, I've not found a script that will show remaining characters however, I've included an HTML solution that you may be able to modify.
Example 1

Set a limit on the number of characters that can be typed into a field.

var f = this.getField("myText");
f.charLimit = 210;

Example 2

1. Open the Text field properties on a field.

2. Click the Format tab.

3. Click the Custom Keystroke Script radio button.

4. Click Edit and add the following script in the JavaScript Editor.

var f = this.getField("myField");
if (event.value.length > 210)
{
var msg = "Your entry is too long
(limit 210 chars).";
app.alert(msg);
}

+++++++++++++++++++++++++++++++++++
HTML solution code - Between the Head tags:



maxL=210;
function taLimit(taObj) {
    if (taObj.value.length==maxL) return false;
    return true;
}

function taCount(taObj,Cnt) {
    objCnt=createObject(Cnt);
    objVal=taObj.value;
    if (objVal.length>maxL) objVal=objVal.substring(0,maxL);
    if (objCnt) objCnt.innerText=maxL-objVal.length;
    return true;
}
function createObject(objId) {
    if (document.getElementById) return document.getElementById(objId);
    else if (document.layers) return eval("document." + objId);
    else if (document.all) return eval("document.all." + objId);
    else return eval("document." + objId);
}


++++++++++++++++++++++++++++++++++++++++++++

Between the body tag:

Maximum Number of characters for this text box is 210.

You have 210 characters remaining
for your event description...