Difference In Calling Javascript In Href And Onclick Of Anchor Tag.

I am looking for a generic javascript function to identify the form with in which a element exists, thus developer can avoid coding like document.forms[index].submit() - where they are sure, they want the form with in which this element exists is to be submitted. This way when forms are introduced at top level the code can remain unchanged, else every form introduce above in the DOM will result in increasing the index by one.

The code is given below. While doing so i am stuck with 2 problems
P1: In the code, you can see i am giving a explicit 'break' in the code. If i don't do so the code seems to be looping. Obviously i am missing some basic.

P2: I am able to pass 'this' for anchor element by name="xy"
<a href="#" name="xy"

in its onclick function by which, in the javascript function i move up the DOM.

While i am unable to do that on the anchor element given below since this function is now on the href attribute.

<a name="xy1" href="javascript:doFormSubmit(this);">Q test</a>

Hence the script fails. Code: