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javascript cookie functions

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  1. function createCookie(name,value,days) {
  2.   if (days) {
  3.     var date = new Date();
  4.     date.setTime(date.getTime()+(days*24*60*60*1000));
  5.     var expires = "; expires="+date.toGMTString();
  6.   }
  7.   else expires = "";
  8.   document.cookie = name+"="+value+expires+"; path=/";
  9. }
  10.  
  11. function readCookie(name) {
  12.   var nameEQ = name + "=";
  13.   var ca = document.cookie.split(';');
  14.   for(var i=0;i < ca.length;i++) {
  15.     var c = ca[i];
  16.     while (c.charAt(0)==' ') c = c.substring(1,c.length);
  17.     if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  18.   }
  19.   return null;
  20. }
  21.  
  22. /* Example use
  23. window.onload = function(e) {
  24.   var cookie = readCookie("style");
  25.   var title = cookie ? cookie : getPreferredStyleSheet();
  26.   setActiveStyleSheet(title);
  27. }
  28.  
  29. window.onunload = function(e) {
  30.   var title = getActiveStyleSheet();
  31.   createCookie("style", title, 365);
  32. }
  33. */

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