I am working on validating all the pages on my webpage.
I have run into a few little things that are beyond my scope of knowledge

One of them is this one and if I can figure this out (hopeing someone here may know) it will fix 15 pages.
First off the pages are all:
<!DOCTYPE html public "-//W3C//DTD HTML 4.01 Transitional//EN">
The only error I have that is stopping validation is this one:
Validation Output: 1 Error
Line 72, Column 15: required attribute "ACTION" not specified.
<form name="sm"> ✉
The attribute given above is required for an element that you've used, but you have omitted it. For instance, in most HTML and XHTML document types the "type" attribute is required on the "script" element and the "alt" attribute is required for the "img" element.
Typical values for type are type="text/css" for <style> and type="text/javascript" for <script>.
Does anyone know what action I need to specify?
This form is for clicking on an image, then getting the link to the image in a box that you can copy it from.
Here is the full code for the form:
<form name="sm">
<INPUT type="text" size="45" value="left click smiley, right click here to copy code"
name="wert">
<select name="output" onChange="changeOutput()">
<option value="ubb1" selected>img</option>
<option value="emai">html</option>
</select>
</form>