javascript - Deleting cookies function is not working -


i want delete cookies, code works upto , set cookies,,, deleting of cookie not working please suggest me answer

code

<body>     <select id="themeselect" onchange="savetheme(this.value);">         <option value="1">one</option>         <option value="2">two</option>         <option value="3">three</option>         <option value="4">four</option>         <option value="5">five</option>     </select>     <button type="button" onclick="showcookie();">getcookie</button>     <button type="button" onclick="deletecookie(name);">deletecookies</button>      <script>         var saveclass = null;         function savetheme(cookievalue) {             var sel = document.getelementbyid('themeselect');              saveclass = saveclass ? saveclass : document.body.classname;             document.body.classname = saveclass + ' ' + sel.options[sel.value].innerhtml.replace(" ", "").tolowercase();              setcookie('theme', cookievalue, 365);         }          function setcookie(cookiename, cookievalue, ndays) {             var today = new date();             var expire = new date();              if (ndays == null || ndays == 0)                 ndays = 1;              expire.settime(today.gettime() + 3600000 * 24 * ndays);             document.cookie = cookiename + "=" + escape(cookievalue) + ";expires=" + expire.togmtstring();          }          function getcookie(name) {             var re = new regexp(name + "=([^;]+)");             var value = re.exec(document.cookie);             return (value != null) ? unescape(value[1]) : null;          }         function showcookie() {             var = getcookie(name);             alert(a);         }          function deletecookie(name) {             if (getcookie(name)) {                 var cookie_date = new date();  // current date & time                 cookie_date.settime(cookie_date.gettime() - 1);                 document.cookie = cookiename += "=; expires=" + cookie_date.togmtstring();             }         }      </script>  </body> 

function deletecookie(name) {     if (getcookie(name)) {         var cookie_date = new date();  // current date & time         cookie_date.settime(cookie_date.gettime() - 1);         document.cookie = name + "=; expires=" + cookie_date.togmtstring();     } }

cookiename undefined in scope. change name, parameter passed function , should work.

also use + concatenate strings, had additional = there prevented working.

@ this fiddle see in action.


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