Adding additional string to an existing value in a HTML form's input box before submission

I have a form with an input box and I want to change the value before submit.

Example:

<form action="savefiends.php" method="post">

    <input type="text" name="id" value="123456"><br>

    <input type="submit">

</form>

How can I save the value as 123456@example.com without editing savefiends.php?

P.S. user can edit the value

edited Nov 26 '18 at 1:56

slideshowp2

2,60712465

asked Nov 25 '18 at 23:28

Varkoume

103

add a comment |

I have a form with an input box and I want to change the value before submit.

Example:

<form action="savefiends.php" method="post">

    <input type="text" name="id" value="123456"><br>

    <input type="submit">

</form>

How can I save the value as 123456@example.com without editing savefiends.php?

P.S. user can edit the value

edited Nov 26 '18 at 1:56

slideshowp2

2,60712465

asked Nov 25 '18 at 23:28

Varkoume

103

add a comment |

I have a form with an input box and I want to change the value before submit.

Example:

<form action="savefiends.php" method="post">

    <input type="text" name="id" value="123456"><br>

    <input type="submit">

</form>

How can I save the value as 123456@example.com without editing savefiends.php?

P.S. user can edit the value

edited Nov 26 '18 at 1:56

slideshowp2

2,60712465

asked Nov 25 '18 at 23:28

Varkoume

103

I have a form with an input box and I want to change the value before submit.

Example:

<form action="savefiends.php" method="post">

    <input type="text" name="id" value="123456"><br>

    <input type="submit">

</form>

How can I save the value as 123456@example.com without editing savefiends.php?

P.S. user can edit the value

html forms post input save

edited Nov 26 '18 at 1:56

slideshowp2

2,60712465

asked Nov 25 '18 at 23:28

Varkoume

103

edited Nov 26 '18 at 1:56

slideshowp2

2,60712465

asked Nov 25 '18 at 23:28

Varkoume

103

edited Nov 26 '18 at 1:56

slideshowp2

2,60712465

edited Nov 26 '18 at 1:56

slideshowp2

2,60712465

edited Nov 26 '18 at 1:56

slideshowp2

2,60712465

asked Nov 25 '18 at 23:28

Varkoume

103

asked Nov 25 '18 at 23:28

Varkoume

103

asked Nov 25 '18 at 23:28

Varkoume

103

add a comment |

1 Answer
1

active

oldest

votes

You can use the onsubmit attribute as shown in the snippet below.

Note: I added extra checking to avoid appending "@example.com" if already present. Also I replaced the action attribute content by "#" to avoid form submission.

function resetId(){

  var idInput = document.getElementById("id");

  var suffix="@example.com";

  // just to check if @example.com is already present

  var checkRegExp=new RegExp(suffix + "$"); 

  if (!idInput.value.match(checkRegExp)) idInput.value +="@example.com";

  alert("Value before submit:" + idInput.value);

}

<form action="#" method="post" onsubmit="resetId();return false">

    <input type="text" name="id" value="123456" id="id"><br>

    <input type="submit">

</form>

answered Nov 26 '18 at 0:17

Amessihel

2,0161724

add a comment |

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1 Answer
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active

oldest

votes

1 Answer
1

active

oldest

votes

You can use the onsubmit attribute as shown in the snippet below.

Note: I added extra checking to avoid appending "@example.com" if already present. Also I replaced the action attribute content by "#" to avoid form submission.

function resetId(){

  var idInput = document.getElementById("id");

  var suffix="@example.com";

  // just to check if @example.com is already present

  var checkRegExp=new RegExp(suffix + "$"); 

  if (!idInput.value.match(checkRegExp)) idInput.value +="@example.com";

  alert("Value before submit:" + idInput.value);

}

<form action="#" method="post" onsubmit="resetId();return false">

    <input type="text" name="id" value="123456" id="id"><br>

    <input type="submit">

</form>

answered Nov 26 '18 at 0:17

Amessihel

2,0161724

add a comment |

You can use the onsubmit attribute as shown in the snippet below.

Note: I added extra checking to avoid appending "@example.com" if already present. Also I replaced the action attribute content by "#" to avoid form submission.

function resetId(){

  var idInput = document.getElementById("id");

  var suffix="@example.com";

  // just to check if @example.com is already present

  var checkRegExp=new RegExp(suffix + "$"); 

  if (!idInput.value.match(checkRegExp)) idInput.value +="@example.com";

  alert("Value before submit:" + idInput.value);

}

<form action="#" method="post" onsubmit="resetId();return false">

    <input type="text" name="id" value="123456" id="id"><br>

    <input type="submit">

</form>

answered Nov 26 '18 at 0:17

Amessihel

2,0161724

add a comment |

You can use the onsubmit attribute as shown in the snippet below.

Note: I added extra checking to avoid appending "@example.com" if already present. Also I replaced the action attribute content by "#" to avoid form submission.

function resetId(){

  var idInput = document.getElementById("id");

  var suffix="@example.com";

  // just to check if @example.com is already present

  var checkRegExp=new RegExp(suffix + "$"); 

  if (!idInput.value.match(checkRegExp)) idInput.value +="@example.com";

  alert("Value before submit:" + idInput.value);

}

<form action="#" method="post" onsubmit="resetId();return false">

    <input type="text" name="id" value="123456" id="id"><br>

    <input type="submit">

</form>

answered Nov 26 '18 at 0:17

Amessihel

2,0161724

You can use the onsubmit attribute as shown in the snippet below.

Note: I added extra checking to avoid appending "@example.com" if already present. Also I replaced the action attribute content by "#" to avoid form submission.

function resetId(){

  var idInput = document.getElementById("id");

  var suffix="@example.com";

  // just to check if @example.com is already present

  var checkRegExp=new RegExp(suffix + "$"); 

  if (!idInput.value.match(checkRegExp)) idInput.value +="@example.com";

  alert("Value before submit:" + idInput.value);

}

<form action="#" method="post" onsubmit="resetId();return false">

    <input type="text" name="id" value="123456" id="id"><br>

    <input type="submit">

</form>

function resetId(){

  var idInput = document.getElementById("id");

  var suffix="@example.com";

  // just to check if @example.com is already present

  var checkRegExp=new RegExp(suffix + "$"); 

  if (!idInput.value.match(checkRegExp)) idInput.value +="@example.com";

  alert("Value before submit:" + idInput.value);

}

<form action="#" method="post" onsubmit="resetId();return false">

    <input type="text" name="id" value="123456" id="id"><br>

    <input type="submit">

</form>

function resetId(){

  var idInput = document.getElementById("id");

  var suffix="@example.com";

  // just to check if @example.com is already present

  var checkRegExp=new RegExp(suffix + "$"); 

  if (!idInput.value.match(checkRegExp)) idInput.value +="@example.com";

  alert("Value before submit:" + idInput.value);

}

<form action="#" method="post" onsubmit="resetId();return false">

    <input type="text" name="id" value="123456" id="id"><br>

    <input type="submit">

</form>

answered Nov 26 '18 at 0:17

Amessihel

2,0161724

answered Nov 26 '18 at 0:17

Amessihel

2,0161724

answered Nov 26 '18 at 0:17

Amessihel

2,0161724

answered Nov 26 '18 at 0:17

Amessihel

2,0161724

add a comment |

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