Javascript form input field selection and AJAX

I think I want to do something simple, but I'm not su开发者_开发问答re how to execute it. I have been trying for hours now, with little luck.

function myFunc (form) {
    // determine currently selected field on form - Thank you James!
    var currElem = document.activeElement;
    myAJAX_request();  // This will regenerate the form (no field selected)
    // restore currently selected field on form
    currElem.focus();  // This does NOT work -- WHY?
    currElem.select();
}

I'm looking for a clean implementation that will use "document.forms..." to find the input fields, instead of having to put an id tag on every single form element. Is this possible?

You can use framework such as jQuery. jQuery has .serialize() method that should do exactly what you need. Here it is

You could use document.getElementByName. I do assume you have names for your fields atleast, don't you ? Store them in a variable/cookie and retrieve it back after your myAjax_request().

and to make your life easier in future,

You could use other selectors of jquery, like name, class, etc.
Read about jQuery's selectors here.