Expanded Serializer

jsonForm.js

$.fn.serializeObject = function()
{
   var o = {};
   var a = this.serializeArray();
   $.each(a, function() {
   	   var oldName = this.name;
   	   this.name = this.name.replace(/\[\]/g, '');
   	   
   	   if (this.name.indexOf('[') >= 0) {
   	   	var innerName = this.name.match(/.*\[(.*)\]/)[1];
   	   	var outterName = this.name.split("[")[0];
   	   	if (o[outterName]) {
   	   		if (o[outterName][innerName]) {
   	   			if (!o[outterName][innerName].push) {
   	   			    o[outterName][innerName] = [o[outterName][innerName]];
   	   			}
   	   			o[outterName][innerName].push(this.value || '');
   	   		}
   	   		else {
   	   			console.log(this.name);
	   	   		if ((oldName).indexOf('[]') >= 0) {
	   	   			o[outterName][innerName] = [this.value] || '';
	   	   		}
	   	   		else {
	   	   			o[outterName][innerName] = this.value || '';
	   	   		}
   	   		}
   	   	}
   	   	else {
   	   		o[outterName] = {};
   	   		if (o[outterName][innerName]) {
   	   			if (!o[outterName][innerName].push) {
   	   			    o[outterName][innerName] = [o[outterName][innerName]];
   	   			}
   	   			o[outterName][innerName].push(this.value || '');
   	   		}
   	   		else {
   	   			console.log(this.name);
   	   			if (oldName.indexOf('[]') >= 0) {
   	   				o[outterName][innerName] = [this.value] || '';
   	   			}
   	   			else {
   	   				o[outterName][innerName] = this.value || '';
   	   			}
   	   		}
   	   	}
   	   }
   	   else {
	       if (o[this.name]) {
	           if (!o[this.name].push) {
	               o[this.name] = [o[this.name]];
	           }
	           o[this.name].push(this.value || '');
	       } else {
	           o[this.name] = this.value || '';
	       }
       }
   });
   return o;
};

I'd say that if it works, then you're good to go. Admittedly it's not the prettiest code I've seen, but that's not really an important detail in the long run. I'd suggest writing a few simple unit tests, since the logic is fairly complex.