For some reason I always forgot the CSS code required to change the mouse cursor. You can switch cursors for any reason, but I like to change the cursor when a user hovers over a submit button. This affirms that clicking the button will trigger an action. Here is a quick tutorial on how to use CSS to change the cursor altogether or only for on-hover events.
Changing the cursor for the entire page
This is very simple to do. Put the following CSS in your style sheet:
html { cursor: crosshair; }
See this code running here: https://jsfiddle.net/45nvntgf/
There are a number of cursors that you can use. Checkout the following reference for a list: cursor
Changing the cursor for on hover events
HTML:
<input type="submit">
CSS:
input[type="submit"]:hover { cursor: pointer; }
Checkout the result here: https://jsfiddle.net/aub7s8ea/