different browsers handle the image input type differently.
with an image input type, you cant rely on the value for a trigger. some browsers will not pass the value as part of the form post for an image input type.
all browsers, though, will pass the x an y coordinates of where the image was clicked.
I cant speak to the Interakt code, I dont see where they reference the submit button as a trigger, but in the Web Assist code, triggers will be written directly as if statements.
when using a submit button type:
<input type="submit" name="KT_Insert1" id="KT_Insert1" value="Post your query" />
the trigger code would be written as:
if (isset($_POST["KT_Insert1"])) // Trigger
using an image input type of the same name:
<input name="KT_Insert1" type="image" id="KT_Insert1" onmouseover="MM_swapImage('KT_Insert1','','images/buttons/post_enq uiry2.jpg',1)" onmouseout="MM_swapImgRestore()" value="Post your query" src="../images/buttons/post_enquiry1.jpg" border="0" />
that code would work reliably on all browsers, so the webassist trigger code would be re written as:
if (isset($_POST["KT_Insert1_x"])) // Trigger
to check for the x coordinates of where the image was clicked.
here's a fun test to illustrate the issue: Create a blank php page with a form on it, add 3 text boxes, a submit button and an image element
add the following code at the bottom:
<?php var_dump($_POST); ?>
this will write the entire contents of the post array to the page when it is submitted, test this in various browsers and you should see that most dont pass the image elements value, but they do pass the x and y coordinates of where the mouse clicked it.