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php and javascript


php_novice2007

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Hi,

 

I'm writing a page which has a form and I want a pop up box which confirms with the user before going to the next page...

 

This is my code so far:

 

<html>
<head>
<script type="text/javascript">
function confirm_delete(){
  var r=confirm("Are you sure?"); // can i add in " you want to delete unit 100?"
  if (r==true){
    // it automatically goes to delete_command.php, passing in the value chosen
  }
  else {
    window.location="testphpJava.php";  // doesn't work, goes to delete_command.php anyway :S
  }
}
</script>
</head>
<body>
    <b>Delete a unit: </b><br>
    <form name="myform" action="deleteCommand.php" method="POST">
    Please select the unit number:
    <select name="unitNum"> 
<?php
    $unit_commands = array();
    $unit_commands[0] = 1;
    $unit_commands[1] = 2;
    $unit_commands[2] = 10;
    for($j=0; $j < count($unit_commands); $j++) {
     // print $unit_commands[$j];
      print "<option value=$unit_commands[$j]>$unit_commands[$j]</option>";
    }
?>
    </select><br>
    <input type="Submit" name="a" action="delete_command.php" value="Delete Command" onclick="confirm_delete();">
    <br></form></body></html>

 

The bit I'm most concerned with is that even if the user clicks cancel, delete_command.php is still loaded. How do I stop it so that it just stays at the current page?

 

Also (not essential but it would make the site better...), would it be possible to somehow pass the unit number chosen to the javascript, so that instead of just asking "Are you sure?" it can ask "Are you sure you want to delete unit 2?"

 

I really need to figure out the first bit, can't find anything on the web.. :(

 

Thanks in advance!

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;) try this it works for me:

 

window.location.href="testphpJava.php"

-----------

about the delete try this:

 

function delete() {

var c = confirm("Are you sure you want to delete?");

if (c==true)

return true;

}

 

so in your form it would be like this:

<form name="myform" action="deleteCommand.php" method="POST" onsubmit="delete(); return false">

 

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function _delete() {
var c = confirm("Are you sure you want to delete?");
if (c==true) 
   return true;
}

</script>
</head>
<body>
    <b>Delete a unit: </b><br>
    <form name="myform" action="deleteCommand.php" method="POST" onsubmit="_delete(); return false">
    Please select the unit number:
    <select name="unitNum"> 
<?php
    $unit_commands = array();
    $unit_commands[0] = 1;
    $unit_commands[1] = 2;
    $unit_commands[2] = 10;
    for($j=0; $j < count($unit_commands); $j++) {
     // print $unit_commands[$j];
      print "<option value=$unit_commands[$j]>$unit_commands[$j]</option>";
    }
?>
    </select><br>
    <input type="Submit" name="a" value="Delete Command">
    <br></form></body></html>  

 

Now it just stays on the same page whether I click ok or cancel...

 

I also tried the other way of using window.location.href="testphpJava.php" instead of just window.location in the code from my first post, my page still went to deleteCommand.php... :(

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Hi,

 

my browser is IE7. How do I get error console.? There didn't seem to be any javascript error..

When I click on Delete Command, it just takes me to deleteCommand.php straight away, there was no confirmation box at all..

 

I copied your code into my code and the full code is:

 

<html>

<head>

<script type="text/javascript">

 

function delete() {

var c = confirm("Are you sure you want to delete?");

if (c==true)

  return true;

}

 

</script>

</head>

<body>

    <b>Delete a unit: </b><br>

    <form name="myform" action="deleteCommand.php" method="POST" onsubmit="delete(); return false">

    Please select the unit number:

    <select name="unitNum">

<?php

    $unit_commands = array();

    $unit_commands[0] = 1;

    $unit_commands[1] = 2;

    $unit_commands[2] = 10;

    for($j=0; $j < count($unit_commands); $j++) {

      print "<option value=$unit_commands[$j]>$unit_commands[$j]</option>";

    }

?>

    </select><br>

    <input type="Submit" name="a" value="Delete Command">

    <br></form></body></html> 

 

 

weird.. :S

 

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Call this java script on the link for delete.Pass the relevant id's as the parameters

 

eg: if the user clicks cancel the the link wud be the same page

$p=same page

 

if the user clicks yes, the page wud be delete.php

$d=delete.php

 

function Alert(d,p)
{varp=p;
var d=d;
var where_to= confirm("Do you really want to delete this job posting??");
if (where_to== true)
{
   window.location=d;
}
else
{
  window.location=p;
  }
}

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oh thank you  ;D It works now. I did changed your code slightly though.. oh and its a little weird because the javascript is not immediately executed even though i put it in the head section of the code.. I had to call it in the body:

 

testphpJava.php

 

<html>
<body>
    <b>Delete a unit: </b><br>
    <form name="myform" action="deleteCommand.php" method="post">
    Please select the unit number:
    <select name="unitNum"> 
<?php
    $unit_commands = array();
    $unit_commands[0] = 1;
    $unit_commands[1] = 2;
    $unit_commands[2] = 10;
    for($j=0; $j < count($unit_commands); $j++) {
     // print $unit_commands[$j];
      print "<option value=$unit_commands[$j]>$unit_commands[$j]</option>";
    }
?>
    </select><br>
    <input type="Submit" name="a" value="Delete Command">
    <br></form></body></html>

 

deleteCommand.php

<html>
<head>
<script type="text/javascript">
function alert()
{
  //var p=p;
  //var d=d;
  var where_to= confirm("Do you really want to delete this job posting??");
  if (where_to== true) {
    //window.location="deleteCommand.php";
  } else {
    window.location="testphpJava.php";
  }
}
</script>
</head>

<body>
<script> alert();</script>
<?php
  if (isset($_POST['unitNum'])) {
    echo $_POST['unitNum'];
  }
?>
</body>
</html>

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