Input, button, different type value the trap that results when the Ajax submits the form _ form effects

Today in doing the use of connection as a form submission process found that the label "input" and "botton" in the Type attribute setting is also a learning.
In the development process, to make the HTML code cleaner, I first submitted the form using the YAHOO.util.Event.addListener (obj, "click", Callback) class to load the "click" Event. YAHOO.util.Connect.asyncRequest (' POST ') to upload form data, if the form information is incorrect, then return processing. And the submitted button I adopted is <button type= "submit" > Submit </button>.
In addition to IE6 to be able to make the correct processing of my form data, Firefox including IE7 can not respond to my error handling (callback method, the error is handled in the way is: as long as the error, then return by returning false way).
At this time in my thinking is, in the statement before submitting the form data I have done return processing, but the page is still to refresh it.
Back home in the evening again to test the problems encountered today, as it turns out, I overlooked a point where the data was actually submitted, and the data was clearly visible in the address bar, and the fact that the data was definitely being submitted made it possible to think of my button, and the category setting for the button was "submit", Before writing code, are directly in the "input" or "button", if the category is set to "submit" when the onclick= "return Fun ();" or onclick= "Fun" (); return false; This naturally is not a problem, strange blame, AddListener class value is not directly affect the button, a click button, Nature will submit data.
Painful AH ~ ~ ~ ~ ~
Attach: Button The default type value is Submit, so it is best to identify the next category!!! Remember!