在fieldname调用中添加变量？

I need to enable some disabled fields in my html page that have a count for example :

<input type="text" name="company_<?php echo $j; ?>"size="10" disabled="disabled">

where $j is a counter variable... so i need to do something like this in javascript part to enable these fields:

document.form1.company_"VARIABLE".disabled=false;

so is it even possible to add a Variable value in such a place ??

document.getElementsByName("company_" + yourVariable)[0].disabled = false;

I think this is what you are looking for