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can javascript remember old values?

 
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can javascript remember old values?, want to use java to return html text inputs to default values initiall
adamgram
23 Sep, 2008 - 04:14 PM
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Okay, so I have a PHP/MySQL based site and I'm trying to put together an 'edit your post' page. Basically everything the user previously put in pops up as an html form with disabled fields. Currently I have a Java script activated by a link to remove the 'disable' from an individual field if the user wants to edit it, but I also want to add a 'reset' link to return to the initial values if the user changes his/her mind about one field in the midst of filling out the form.

When the form first pops up, the initial html values are dictated by PHP. By clicking 'edit' they can alter these values, and what I want them to be able to click 'reset' and return to the initial values. However, since PHP is on the server and Java with the client, if I understand things correctly Java can't re-retrieve the PHP values as I did the first time around.

Instead I am curious to find a way with Java read the initial value, remember it, and later, if the user hits 'reset', send it back to the HTML. Below is a piece of my code. Basically I want to replace the "default" in the rest_name_rest function with whatever the output of <?php echo $row[rest_name]?> was when the page was first loaded. Thanks in advance for the help!!!

CODE

<html>
<head>

<script type="text/javascript">
function rest_name_enable(){
if (document.all || document.getElementById){
document.form_name.rest_name.disabled=false}}
</script>

<script type="text/javascript">
function rest_name_reset(){
if (document.all || document.getElementById){
if (document.form_name.rest_name.disabled==false)
{var r=confirm("This will delete whatever you just typed!!" + '\n' +
"Are you sure you want to reset the Restaurant Name?");
if (r==true)  {
document.form_name.rest_name.disabled=true
document.form_name.rest_name.value="default"}
else {}}
else {}}}

</script>
</head>
<body>

<form name="form_name">
<input name="rest_name" type="text" value="<?php echo $row[rest_name]?>" disabled="disabled">
<a href = "java script:rest_name_enable()">edit</a>
<a href = "java script:rest_name_reset()">reset</a><br>

</body>
</html>


Moved to JavaScript forum

This post has been edited by pbl: 23 Sep, 2008 - 04:46 PM
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BetaWar
RE: Can Javascript Remember Old Values?
23 Sep, 2008 - 04:46 PM
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This is the wrong forum, this is a javascript question, not a Java question.

Basically all you need to do is create a variable that holds the initial values, and if the user decides to revert the value it pulls the value from the variable and places it in the field.
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adamgram
RE: Can Javascript Remember Old Values?
23 Sep, 2008 - 05:14 PM
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QUOTE(BetaWar @ 23 Sep, 2008 - 05:46 PM) *


Basically all you need to do is create a variable that holds the initial values, and if the user decides to revert the value it pulls the value from the variable and places it in the field.


Yes, but how? I tried the obvious... putting

var def;
def=document.form_name.rest_name.value;

at various stages in the script, but nothing seemed to work...
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BetaWar
RE: Can Javascript Remember Old Values?
23 Sep, 2008 - 05:36 PM
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You are looking for something like this:

CODE
<script type="text/javascript">
function rest_name_enable(){
  if(document.all || document.getElementById){
    document.form_name.rest_name.disabled = false;
    document.form_name.rest_name.defVal = document.form_name.rest_name.value;
  }
}

function rest_name_reset(){
  if(document.all || document.getElementById){
    if(document.form_name.rest_name.disabled == false){
      var r = confirm("This will delete whatever you just typed!!\nAre you sure you want to reset the Restaurant Name?");
      if(r == true){
        document.form_name.rest_name.disabled = true;
        document.form_name.rest_name.value = document.form_name.rest_name.defVal;
      }
      else{
      }
    }
    else{
    }
  }
}

</script>

<form name="form_name">
<input name="rest_name" type="text" value="<?php echo $row[rest_name]?>" disabled="disabled">
<a href = "java script:rest_name_enable()">edit</a>
<a href = "java script:rest_name_reset()">reset</a><br>


I posted a snippet on something like this a while back:
http://www.dreamincode.net/code/snippet2326.htm

Hope that helps.
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adamgram
RE: Can Javascript Remember Old Values?
23 Sep, 2008 - 05:47 PM
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SWEET!! Thanks a lot man. I'm really new to all this and building this site as a way of learning... I read online tuts and whatnot but sometime specific questions are hard to track down. I really appreciate all the help I've got on these forums. Thanks again!

QUOTE(BetaWar @ 23 Sep, 2008 - 06:36 PM) *

You are looking for something like this:

CODE
<script type="text/javascript">
function rest_name_enable(){
  if(document.all || document.getElementById){
    document.form_name.rest_name.disabled = false;
    document.form_name.rest_name.defVal = document.form_name.rest_name.value;
  }
}

function rest_name_reset(){
  if(document.all || document.getElementById){
    if(document.form_name.rest_name.disabled == false){
      var r = confirm("This will delete whatever you just typed!!\nAre you sure you want to reset the Restaurant Name?");
      if(r == true){
        document.form_name.rest_name.disabled = true;
        document.form_name.rest_name.value = document.form_name.rest_name.defVal;
      }
      else{
      }
    }
    else{
    }
  }
}

</script>

<form name="form_name">
<input name="rest_name" type="text" value="<?php echo $row[rest_name]?>" disabled="disabled">
<a href = "java script:rest_name_enable()">edit</a>
<a href = "java script:rest_name_reset()">reset</a><br>


I posted a snippet on something like this a while back:
http://www.dreamincode.net/code/snippet2326.htm

Hope that helps.
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BetaWar
RE: Can Javascript Remember Old Values?
23 Sep, 2008 - 05:51 PM
Post #6

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No problem, happy to have helped out smile.gif
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