How can i solve this issue ?

  1. PROPER EVENT BINDING: Consider using the preferred .on() method rather than .click(), .bind(), .hover(), etc. For best performance and concise code use event delegation whenever possible: http://code.tutsplus.com/tutorials/quick-tip-javascript-event-delegation-in-4-minutes--net-8961

  2. PARSEINT REQUIRES A RADIX: Please make sure you are supplying a radix for all parseInt().

** Conversion of existing item