使用函数计算文本框字符

Question

So I have been trying to get this working for 2 days now and still no luck. I have a function that counts the characters of a textbox and display the results in a label.

function textCounter2(field, counter, maxlimit) {

    if (field.value.length > maxlimit)
        field.value = field.value.substring(0, maxlimit);
    else
        document.getElementById('subtitlecount_lbl').innerText = maxlimit - field.value.length;
}

What I am trying to do is to use (input variable counter) inside getElementByID instead of manually typing subtitlecount_lbl.

I need to use the same function for about 15 textbox and labels.

Answer 1

Its working fine. Maybe it is a problem with the correct parameter handover.

 function textCounter2(field, counter, maxlimit) { if (field.value.length > maxlimit) { field.value = field.value.substring(0, maxlimit); } else { document.getElementById(counter).innerText = maxlimit - field.value.length; } } 

 <input name="test" onkeyup="textCounter2(this, 'subtitlecount_lbl', 5)" onchange="textCounter2(this, 'subtitlecount_lbl', 5)" /><br /> <span id="subtitlecount_lbl"></span> characters left