asking a lot here... cookies!

sonicsnail · Nov 21, 2001

Hi all,

I have a page that contains a textarea, and lots of checkboxes.. the user ticks some of the boxes, data is passed into the textarea, which they then copy/paste into an application.

There is some default content in the textarea from the start, which the user updates every time.. (mostly their own details).

I'd like the default content (or some of it) to be written in by a cookie. ie. they enter their name etc once into a popup, and everytime they access the page, it sets the default data up with their own details.

Can anyone point me in the right direction? - I know this is a pretty tricky one, but any online resources would be appreciated.

sonicsnail · Nov 21, 2001

can no one point me in the direction of a helpful url?

BigBadDave · Nov 21, 2001

heres some info on using cookies :

http://www.webtools.com/story/dhtml/TLS19981103S0001

Regards

Big Dave

davidbyng@hotmail.com

** If I am wrong I am sorry, but i'm only trying to help!! **

CliveC · Nov 26, 2001

Can't claim originality for this as I found it in a book "Mastering JavaScript and Jscript" by James Jaworski, sybex books, but it may be able to be adapted for your purposes.

<HTML>
<HEAD>
<TITLE>To Do</TITLE>
<SCRIPT LANGUAGE="JavaScript" SRC="cookie.js"></SCRIPT>
<SCRIPT LANGUAGE="JavaScript" SRC="notes.js"></SCRIPT>
</HEAD>
<BODY>
<FORM>
<H3>To Do:
<INPUT NAME="save" TYPE="BUTTON" VALUE="Save"
onClick="saveNotes()"></H3>
<TEXTAREA NAME="notes" ROWS="10" COLS="40"
VALUE=""></TEXTAREA>
</FORM>
<SCRIPT LANGUAGE="JavaScript"></SCRIPT>
</BODY>
</HTML>

NOTES.JS
function loadNotes() {
var cookie=document.cookie
if(nameDefined(cookie,"toDo&quot

) {
todo=getCookieValue(cookie,"toDo&quot

todo=decode(todo)
}else todo=""
document.forms[0].notes.value=todo
}
function saveNotes() {
todo=window.document.forms[0].notes.value
todo=encode(todo)
var newCookie = "toDo="+todo+"; expires="
newCookie += "Thursday, 20-Feb-2048 00:01:00 GMT"
document.cookie=newCookie
}
function encode(s) {
t=""
for(var i=0;i<s.length;++i) {
ch=s.charAt(i)
if(ch=="/&quot

t += "//"
else if(ch==" &quot

t += "/b"
else if(ch==",&quot

t += "/."
else if(ch==";&quot

t += "/:"
else if(ch=="\n&quot

t += "/n"
else if(ch=="\r&quot

t += "/r"
else if(ch=="\t&quot

t += "/t"
else if(ch=="\b&quot

t += "/b"
else t += ch
}
return t
}
function decode(s) {
// Decode the encoded cookie value
t=""
if(s==null) return t
for(var i=0;i<s.length;++i) {
var ch=s.charAt(i)
if(ch=="/&quot

{
++i
if(i<s.length){
ch=s.charAt(i)
if(ch=="/&quot

t += ch
else if(ch==".&quot

t += ","
else if(ch==":&quot

t += ";"
else if(ch=="n&quot

t += "\n"
else if(ch=="r&quot

t += "\r"
else if(ch=="t&quot

t += "\t"
else if(ch=="b&quot

t += " "
}
}else t += ch
}
return t
}

COOKIE.JS
function nameDefined(c,n) {
var s=removeBlanks(c)
var pairs=s.split(";&quot

for(var i=0;i<pairs.length;++i) {
var pairSplit=pairs.split("=&quot

if(pairSplit[0]==n) return true
}
return false
}
function removeBlanks(s) {
var temp=""
for(var i=0;i<s.length;++i) {
var c=s.charAt(i)
if(c!=" &quot

temp += c
}
return temp
}
function getCookieValue(c,n) {
var s=removeBlanks(c)
var pairs=s.split(";&quot

for(var i=0;i<pairs.length;++i) {
var pairSplit=pairs.split("=&quot

if(pairSplit[0]==n) return pairSplit[1]
}
return ""
}

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asking a lot here... cookies!

sonicsnail

Technical User

sonicsnail

Technical User

BigBadDave

Programmer

CliveC

Programmer

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