Question

Here is my form:

<INPUT TYPE=TEXT NAME="input1" SIZE=10>
<INPUT TYPE=TEXT NAME="input2" SIZE=10>
<INPUT TYPE="button" VALUE="+" name="add"
onclick="CalculateIMSUB(this.form)">
<INPUT TYPE=TEXT NAME="Answer" SIZE=12>

Here is my function:

function CalculateIMSUB(form) {
var Atext = form.input1.value;
var Btext = form.input2.value;
var val = form.val.value;
var A = eval(Atext);
var B = eval(Btext);    
var answer = A - B;
form.Answer.value = answer;
}

Here is my question:
I want my function to operate through classname. So, if my form were to look like this instead:

<INPUT TYPE=TEXT classNAME="input1" name="baboon" SIZE=10>
<INPUT TYPE=TEXT classNAME="input2" name="gorilla" SIZE=10>
<INPUT TYPE="button" VALUE="+" name="add"
onclick="CalculateIMSUB(this.form)">
<INPUT TYPE=TEXT NAME="Answer" SIZE=12>

The calculater function would still work.
Many thanks

Answer 1

You could use the following to retrieve the element:

function CalculateIMSUB(form) {
var Atext = form.getElementById('input1').value;
var Btext = form.getElementById('input2').value;
var val = form.val.value;
var A = eval(Atext);
var B = eval(Btext);    
var answer = A - B;
form.Answer.value = answer;
}

for the following HTML:

<INPUT TYPE=TEXT id="input1" name="baboon" SIZE=10>
<INPUT TYPE=TEXT id="input2" name="gorilla" SIZE=10>
<INPUT TYPE="button" VALUE="+" name="add"
onclick="CalculateIMSUB(this.form)">
<INPUT TYPE=TEXT NAME="Answer" SIZE=12>