<script type="text/javascript">
function sayHey() {
fo.e4.value=fo.e1.value+fo.e2.value+fo.e3.value;
}
</script>
<FORM name=fo>
<input type=text name=el onchange="sayHey()"><br>
<input type=text name=e2 onchange="sayHey()"><br>
<input type=text name=e3 onchange="sayHey()"><br>
<input type=text name=e4>
</FORM>
I want e4 will show the sum of e1 and e2 after enter to it.
The current one is not working!
Also, i want to change them to array that it will sum up no of field and show in the last field, thank you!
Thank you!