added the form functions from my latest complete version (rev 81)

form/form.js

+/**
+ * Initial frontend function to submit form variables. This function
+ * is for registering coordinates, in the case of an image being used
+ * as the submit element, and sets up an event to listen and wait for
+ * a form submit click. It then calls any following chained functions
+ * to actually gather the variables and submit them.
+ *
+ * Usage examples, when used with getForm().putForm():
+ *
+ * 1. Just eval the results returned from the backend.
+ *    $('#form-id').form();
+ *
+ * 2. Render backend results directly to target ID (expects (x)HTML).
+ *    $('#form-id').form('#target-id');
+ *
+ * 3. Submit to backend URL (form action) then call this function.
+ *    $('#form-id').form(post_callback);
+ *
+ * 4. Load target ID with backend results then call a function.
+ *    $('#form-id').form('#target-id', null, post_callback);
+ *
+ * 5. Call a browser function (for validation) and then (optionally)
+ *    load server results to target ID.
+ *    $('#form-id').form('#target-id', pre_callback);
+ *
+ * 6. Call validation function first then load server results to
+ *    target ID and then also call a browser function.
+ *    $('#form-id').form('#target-id', pre_callback, post_callback);
+ *
+ * @param target   arg for the target id element to render
+ * @param pre_cb   callback function before submission
+ * @param post_cb  callback after any results are returned
+ * @return         "this" object
+ * @see            getForm(), putForm()
+ * @author         Mark Constable (markc@renta.net)
+ * @author         G. vd Hoven, Mike Alsup, Sam Collett
+ * @version        20060606
+ */
+$.fn.form = function(target, pre_cb, post_cb) {
+	$('input[@type="submit"],input[@type="image"]', this).click(function(ev){
+		this.form.clicked = this;
+		if (ev.offsetX != undefined) {
+			this.form.clicked_x = ev.offsetX;
+			this.form.clicked_y = ev.offsetY;
+		} else {
+			this.form.clicked_x = ev.pageX - this.offsetLeft;
+			this.form.clicked_y = ev.pageY - this.offsetTop;
+		}
+	});
+	this.submit(function(e){
+		e.preventDefault();
+		$(this).getForm().putForm(target, pre_cb, post_cb);
+		return this;
+	});
+};
+
+/**
+ * This function gathers form element variables into an array that
+ * is embedded into the current "this" variable as "this.vars". It
+ * is normally used in conjunction with form() and putForm() but can
+ * be used standalone as long as an image is not used for submission.
+ *
+ * Standalone usage examples:
+ *
+ * 1. Gather form vars and return array to LHS variable.
+ *    var myform = $('#form-id').getForm();
+ *
+ * 2. Provide a serialized URL-ready string (after 1. above).
+ *    var mystring = $.param(myform.vars);
+ *
+ * 3. Gather form vars and send to RHS plugin via "this.vars".
+ *    $('#form-id').getForm().some_other_plugin();
+ *
+ * @return         "this" object
+ * @see            form(), putForm()
+ * @author         Mark Constable (markc@renta.net)
+ * @author         G. vd Hoven, Mike Alsup, Sam Collett
+ * @version        20060606
+ */
+$.fn.getForm = function() {
+	var a = [];
+	var ok = {INPUT:true, TEXTAREA:true, OPTION:true};
+
+	$('*', this).each(function() {
+		if (this.disabled || this.type == 'reset' || (this.type == 'checkbox' && !this.checked) || (this.type == 'radio' && !this.checked))
+			return;
+
+		if (this.type == 'submit' || this.type == 'image') {
+			if (this.form.clicked != this)
+				return;
+
+			if (this.type == 'image') {
+				if (this.form.clicked_x) {
+						a.push({name: this.name+'_x', value: this.form.clicked_x});
+						a.push({name: this.name+'_y', value: this.form.clicked_y});
+						return;
+					}
+				}
+		}
+
+		if (!ok[this.nodeName.toUpperCase()])
+			return;
+
+		var par = this.parentNode;
+		var p = par.nodeName.toUpperCase();
+		if ((p == 'SELECT' || p == 'OPTGROUP') && !this.selected)
+			return;
+
+		var n = this.name || par.name;
+		if (!n && p == 'OPTGROUP' && (par = par.parentNode))
+			n = par.name;
+
+		if (n == undefined)
+			return;
+
+		a.push({name: n, value: this.value});
+	});
+
+	this.vars = a;
+
+	return this;
+}
+
+/**
+ * Final form submission plugin usually used in conjunction with
+ * form() and getForm(). If a second argument is a valid function
+ * then it will be called before the form vars are sent to the
+ * backend. If this pre-submit function returns exactly "false"
+ * then it will abort further processing otherwise the process
+ * will continue according to the first and third arguments.
+ *
+ * If the first argument is a function, and it exists, then the form
+ * values will be submitted and that callback function called. If
+ * the first argument is a string value then the "load()" plugin
+ * will be called which will populate the innerHTML of the indicated
+ * element and a callback will be called if there is third argument.
+ * If there are no arguments then the form values are submitted with
+ * an additional variable (evaljs=1) which indicates to the backend
+ * to to prepare the returned results for evaluation, ie; the result
+ * needs to be valid javascript all on a single line.
+ *
+ * Usage example:
+ *
+ * $.fn.myvars = function() {
+ *   this.vars = [];
+ *   for (var i in this) {
+ *     if (this[i] instanceof Function || this[i] == null) continue;
+ *     this.vars.push({name: i, value: this[i].length});
+ *   }
+ *   return this;
+ * }
+ *
+ * precb = function(vars) {
+ *   return confirm('Submit these values?\n\n'+$.param(vars));
+ * }
+ *
+ * $('*').myvars().putForm('#mytarget',precb,null,'myhandler.php');
+ *
+ * @param target   arg for the target id element to render
+ * @param pre_cb   callback function before submission
+ * @param post_cb  callback after any results are returned
+ * @param url      form action override
+ * @param mth      form method override
+ * @return         "this" object
+ * @see            form(), getForm(), load(), xml()
+ * @author         Mark Constable (markc@renta.net)
+ * @author         G. vd Hoven, Mike Alsup, Sam Collett
+ * @version        20060606
+ */
+$.fn.putForm = function(target, pre_cb, post_cb, url, mth) {
+	if (pre_cb && pre_cb.constructor == Function)
+		if (pre_cb(this.vars) === false)
+			return;
+
+	var f = this.get(0);
+	var url = url || f.action || '';
+	var mth = mth || f.method || 'POST';
+
+	if (target && target.constructor == Function) {
+		$.xml(mth, url, $.param(this.vars), target);
+	} else if (target && target.constructor == String) {
+		$(target).load(url, this.vars, post_cb);
+	} else {
+		this.vars.push({name: 'evaljs', value: 1});
+		$.xml(mth, url, $.param(this.vars), function(r) { eval(r.responseText); });
+	}
+
+	return this;
+}