getElementsByClassName & IE8: Object doesn't support this property or method

Question

I know "getElementsByClassName" is not support by IE8. Do you know what can I use instead? I am getting annoying by error

"Object doesn't support this property or method".

The HTML code is:

function sumar() {
var elems = document.getElementsByClassName('verdana14 toAdd');
var myLength = elems.length;
total = 0;
for (var i = 0; i < myLength; ++i) {
   if (elems[i].value!="") {
       total += parseInt(elems[i].value,10);
       }
    }

var promedio = total/myLength;
parseFloat(document.getElementById('promediocal').value = promedio.toFixed(2));
}

This the input text that calls the javascript function:

<input name='AE_EA_1_BIV_003_2' type='text' class='verdana14 toAdd' id='AE_EA_1_BIV_003_2' style='width:50px' onChange='sumar()'/>
<input name='AE_EA_1_BIV_003_3' type='text' class='verdana14 toAdd' id='AE_EA_1_BIV_003_3' style='width:50px' onChange='sumar()'/>
<input name='AE_EA_1_BIV_003_4' type='text' class='verdana14 toAdd' id='AE_EA_1_BIV_003_4' style='width:50px' onChange='sumar()'/>

Answer 1

Use document.querySelectorAll('.verdana14.toAdd').

See also my related blog post.