Element.toFormHash.js

// TODO: Remove this once it's added to MooTools code
Element.implement({
	toFormHash: function(){
		var formHash = $H();
		this.getElements('input, select, textarea', true).each(function(el){
			if (!el.name || el.disabled) return;
			var value = (el.tagName.toLowerCase() == 'select') ? Element.getSelected(el).map(function(opt){
				return opt.value;
			}) : ((el.type == 'radio' || el.type == 'checkbox') && !el.checked) ? null : el.value;
			$splat(value).each(function(val){
				if (typeof val != 'undefined') 
					formHash.set(el.name, val);
			});
		});
		return formHash;
	}
});