Get element by part of Name or ID
forms, javascript
Solution
Your best bet is probably `document.querySelectorAll`, which you can use any CSS selector with, including an "attribute starts with" selector like `input[id^="id_qtedje_"]`. It's supported on all modern browsers, and also IE8:
var elements = document.querySelectorAll('input[id^="id_qtedje_"]');
If you wanted just the first match (rather than a list), you could use `document.querySelector` instead. It returns a reference to the first match in document order, or `null` if nothing matched.
Alternately, you could give the elements a class name, then use `document.getElementsByClassName`, but note that while `getElementsByClassName` was supported in old versions of Chrome and Firefox, IE8 doesn't have it, so it's not as well-supported as the more-useful `querySelectorAll` in the modern era.
var elements = document.getElementsByClassName("theClassName");
If you use any libraries (jQuery, MooTools, Closure, Prototype, etc.), they're likely to have a function you can use to look up elements by just about any CSS selector, filling the gaps in browser support with their own code. For instance, in jQuery, it's the `$` (`jQuery`) function; in MooTools and Prototype, it's `$$`.
Problem
Here is an example of my form (only inputs that I want, but there is many others): ``` <form name="inputform" action="..." method="post"> <input type="hidden" name="id_qtedje_77" id="id_qtedje_77" value="0"> <input type="text" id="id_qte_77" name="prestation_detail_fields[77][qte_collecte]" value="0.00"> <input type="text" id="id_rec_77" name="prestation_detail_fields[77][reliquat_conforme]" value="0.00"> <input type="text" id="id_ren_77" name="prestation_detail_fields[77][reliquat_non_conforme]" value="0.00"> <input type="checkbox" name="prestation_detail_fields[77][dechet_non_present]" value="1"> <!-- another TR --> <input type="hidden" name="id_qtedje_108" id="id_qtedje_108" value="0"> <input type="text" id="id_qte_108" name="prestation_detail_fields[108][qte_collecte]" value="0.00"> <input type="text" id="id_rec_108" name="prestation_detail_fields[108][reliquat_conforme]" value="0.00"> <input type="text" id="id_ren_108" name="prestation_detail_fields[108][reliquat_non_conforme]" value="0.00"> <input type="checkbox" name="prestation_detail_fields[108][dechet_non_present]" value="1"> </form> ``` What I want is to get values of inputs, but as the form is built in PHP, I don't know the line identifier (77, 108). Is there a way to do something like `getElementByName('id_qtedje_%')` ? Note: I'm not using any library, and I don't plan to use one.