jquery enables the number of shopping carts to be added and reduced, the price calculation function

HTML code:

<! Doctype html>

JS Code:
/**** Click Add button ****/$ ('. Add '). Click (function () {    //Modify quantity     var n=$ ( This). Next (). HTML (),     var num=parseint (n) +1;    $ (this). Next (). HTML (num);     //calculates the price     var c= $ (this). Parent (). siblings (). Children ('. Price '). html ();     parseint (c);     var subprice =  num * c;    var sub_price = subprice.tofixed (2);  // Keep two decimal     $ (this) after the decimal point. Parent (). siblings (). Children ('. Sub_total '). HTML (sub_price);     //calculates the total price     var total=0;    $ ('. Sub_total '). each ( function () {        var price=parseint ($ (this). html ());         total+=price;        var  total_price =&Nbsp;total.tofixed (2);         $ ('. Total b '). HTML (Total_price);     }); Click the Decrease button ****/$ ('. reduce '). Click (function () {    //Modified quantity     var n= $ (this). Prev (). html ();     var num=parseint (n) -1;    if (num==0) { return;} The number is reduced to 0 and can be reduced by     $ (this). Prev (). html (num);     //Calculate price      var c= $ (This). Parent (). siblings (). Children (". Price"). html ();     parseint ( c);    var subprice = num * c;     Subprice.tofixed (2);     var sub_price = subprice.tofixed (2);     $ (This). Parent (). siblings (). Children ('. Sub_total '). HTML (sub_price);     //Calculate Total Price     var total=0;    $ ('. Sub_total '). each (function () {         var price=parseint ($ (this). html ());         total+=price;        var total_price  = total.tofixed (2);         $ ('. Total b '). HTML (Total_ Price);     });

Given the space issue, no CSS code is posted, and the final page is as follows:
650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/89/1C/wKioL1gIYA6g7MTbAAEULD6Wu_A791.png "title=" Qq20161020141040.png "alt=" Wkiol1giya6g7mtbaaeuld6wu_a791.png "/>
This article is from the "Dapengtalk" blog, make sure to keep this source http://dapengtalk.blog.51cto.com/11549574/1863852
jquery enables the number of shopping carts to be added and reduced, the price calculation function