html - How to write a cookie to remember a username in JavaScript -


i working on login page project , wondering how go setting cookie remember username ?

here sample code. html cookies. 

<!doctype html> <html> <head> <script> function getcookie(c_name) { var c_value = document.cookie; var c_start = c_value.indexof(" " + c_name + "="); if (c_start == -1)   {   c_start = c_value.indexof(c_name + "=");   } if (c_start == -1)   {   c_value = null;   } else   {   c_start = c_value.indexof("=", c_start) + 1;   var c_end = c_value.indexof(";", c_start);   if (c_end == -1)     {     c_end = c_value.length;     }   c_value = unescape(c_value.substring(c_start,c_end));   } return c_value; }  function setcookie(c_name,value,exdays) { var exdate=new date(); exdate.setdate(exdate.getdate() + exdays); var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toutcstring()); document.cookie=c_name + "=" + c_value; }  function checkcookie() { var username=getcookie("username"); if (username!=null && username!="")   {   alert("welcome again " + username);   } else    {   username=prompt("please enter username:","");   if (username!=null && username!="")     {     setcookie("username",username,365);     }   } } </script> </head> <body onload="checkcookie()"> </body> </html>

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