Here is the code to get the lengths for each of the respective options.
$('.tattribute option:selected[value="text"]').length
$('.tattribute option:selected[value="checkbox"]').length
$('.tattribute option:selected[value="select-list"]').length
$('.tattribute option:selected[value="notes"]').length
Here is a fiddle with a hidden field added to keep track of the options count. Every time an option is added or removed the value of the hidden field is incremented or decremented. The changes are in the code below
var template="<div class=\"new-attribute\">"
+ "<h3>New Attribute</h3>"
+ "<label for=\"attributeName[]"+"\">Name:</label>"
+ "<input class=\"attribute\" type=\"text\" name=\"attributeName[]"+"\">"
+ "<input class=\"attribute_count\" type=\"hidden\" name=\"attributeCount[]"+"\">"
+ "<label for=\"attributeType[]"+"\">Type:</label>"
+ "<select class=\"tattribute\" name=\"attributeType[]"+"\">"
+ "<option value=\"text\" selected>Text</option>"
+ "<option value=\"checkbox\">Checkbox</option>"
+ "<option value=\"select-list\">Select Option List</option>"
+ "<option value=\"notes\">Notes</option>"
+ "</select>"
+ "<div class=\"option\"></div>"
+ "<button type=\"button\" class=\"remove\">Delete</button>"
+ "</div>";
And
//Add action
$("#attributes").on('click', '.btn', function () {
add = "<div class=\"op\"><label for=\"attributeOption[]" +"\">Name:</label>"
+ "<input class=\"option-input\" type=\"text\" name=\"attributeOption[]" + "\">"
+"<button type=\"button\" class=\"remove-option\">remove</button></div>";
$(this).after(add);
//COUNT NUMBER OF OPTIONS
$opt = $(this).closest('.option')
$opt.siblings('.attribute_count').val($opt.find('.op').length)
alert($opt.siblings('.attribute_count').val());
});
//Remove input
$("#attributes").on('click', '.remove-option', function () {
$(this).closest('.op').remove();
$opt = $(this).closest('.option')
$opt.siblings('attribute_count').val($opt.find('.op').length)
});