I have a simple bit of code (contained in a CMS and cant be edited) that and needs to be read by Javascript in the header if it has been clicked.

Here is the code:

HTML Code:
<div id="example" class="page-element-outer" style="text-align: left"><div class="page-element-inner" ><input type="image" name="Button1" id="Button" src="/getresource.axd?AssetID=16813" alt="Submit" style="text-align:left;" /></div></div>
Can you assist?