Dynamic form analysis plug-in for use with Google Analytics implementations.

ga_formAnalysis.js

if("undefined"==typeof($tG)){$tG={};}		
/*
	$tG.formAnalysis()
	-	pv_formId = "id" property for html form element being monitored
	-	pv_event = status of form event:  abandon, success, error
*/		
$tG.formAnalysis = function(pv_formId,pv_event) {
	var subDetail="";
	var formId=pv_formId;	
	pv_event=pv_event.toLowerCase();
	
	switch(pv_event) { //set success events based on form status
		case "start":	
			subDetail="";
			jQuery("#"+formId+" :input").live("change",function(e){
				$tG.formLastFieldChanged=this.id;
			});
			if(jQuery("#"+formId).attr("ignoreFormAbandon")!="true") { //capture form abandon, where applicable
				jQuery(window).unload(function() { //capture form abandon
					if(!$tG.isNotAbandon) { $tG.formAnalysis(formId,'abandon',true); }
				});
			}
			break;
		case "abandon":
			($tG.formLastFieldChanged) ? subDetail=$tG.formLastFieldChanged : subDetail="No Data Entered";
			break;
		case "complete":
			$tG.isNotAbandon=true; //prevent abandon call after form complete
			subDetail="";
			break;
		case "error":	
			($tG.formErrorMessage) ? subDetail=$tG.formErrorMessage : subDetail="";
			break;
		default:		subDetail="";break;
	}

	if(subDetail) {
		//category,action,label,value
		_gaq.push(['_trackEvent',formId,$tG.upperCase('form '+pv_event),subDetail]);
	} else { 
		_gaq.push(['_trackEvent',formId,$tG.upperCase('form '+pv_event)]);
	}
}

/*
	$tG.upperCase() - converts first letter of each word to upper case
	- pv_string = string to convert
*/
$tG.upperCase = function(pv_string) {
	pv_string = pv_string.toLowerCase().replace(/\b[a-z]/g, function(letter) {
		return letter.toUpperCase();
	});
	return(pv_string);
}

//Dyanmically apply form analysis logic - REQUIRES JQUERY//
jQuery(document).ready(function() {
	if(jQuery("form[formAnalysis='true']")) {
		jQuery("form[formAnalysis='true']").each(function() {
			$tG.formAnalysis(this.id,"start");
		}) 	
	}
});