Search Image by specified size - html

Question

I got some help a while ago to make something that searches for images on google with a preset size. Now I want to know if it would be possible to change this HTML5 so that you can type in your own size to use instead of a preset one. So if I type 54 in a text box labeled width and 10 in one labeled height, I would only get results with images that have a width of 54 and a height of 10.
<form action="https://www.google.com/search" method="get">
<input name="tbm" value="isch" type="hidden">
<input name="tbs" value="isz:ex,iszw:10328,iszh:7760" type="hidden">
<input name="q" size="35" type="text" placeholder="zelda">
<input type="submit" value="Find 10K images">
</form>

Answer 1

<script>
function addSpecs() {
document.getElementsByName("tbs")[0].value =
"isz:ex,iszw:"
+ document.getElementById("w").value
+ ",iszh:"
+ document.getElementById("h").value;
}
</script>
<form action="//www.google.com/search" method="get">
<input type="hidden" name="tbm" value="isch" />
<input type="hidden" name="tbs" value="" />
w: <input type="text" id="w" /><br />
h: <input type="text" id="h" /><br />
<input type="text" name="q" size="35" /><br />
<input type="submit" value="Find images" onclick="addSpecs();" />
</form>