javascript+php

Submit the form data to the php script only if the user clicks on OK.

function checkSubmission(form)
{
    var ans = confirm("Are you sure you want to delete the row?");
    if(ans)
    {
        //perform validation
        form.submit();
    }
}

Call this function on the onclick event of the submit button and pass to it, the form object. Something like: <input type="button" value="Submit" onclick="checkSubmission(this.form);" />

ok i solve my problem but now i have another one
when i try to use two message box in the same page it dosen't work only one works.

<form method="post" onSubmit="return validar_apagar();" action="dest_agen.php">
.....
<input type="hidden" id="xpto" value="editar"/>              
<input id="botao" type="submit" name="aFazer" value="Editar"/>
<input id="botao" onClick="document.getElementById('xpto').value='apagar';" type="submit" name="aFazer" value="Eliminar" />
</form>

<script>
function validar_apagar()
{
    if (document.getElementById('xpto').value=='apagar')
        return confirm('Deseja apagar a Noticia?');
}
</script>

(.......)
<form method="post" onSubmit="return validar_apagar2();" action="dest_agen.php">
....
<input type="hidden" id="xpto2" value="editar"/>      
<input id="botao2" type="submit"  name="aFazer2" value="Editar"/>
<input id="botao2" onClick="document.getElementById('xpto2').value='apagar';" type="submit" name="aFazer2" value="Eliminar_Evento" />
</form>
function validar_apagar2()
{
    if (document.getElementById('xpto2').value=='apagar')
        return confirm('Deseja apagar o Evento?');
}

</script>

as i said before only the fisrt works i can´t put the second form working can anybody help me????

You forgot to open the <script> tag for the second function i.e. put a script tag after the second </form>.

i´m sory for my mistake but i forget to pass that i have it on my page that srcipt but it doesn´t work....

<form method="post" onSubmit="return validar_apagar();" action="dest_agen.php">
.....
<input type="hidden" id="xpto" value="editar"/>              
<input id="botao" type="submit" name="aFazer" value="Editar"/>
<input id="botao" onClick="document.getElementById('xpto').value='apagar';" type="submit" name="aFazer" value="Eliminar" />
</form>

<script>
function validar_apagar()
{
    if (document.getElementById('xpto').value=='apagar')
        return confirm('Deseja apagar a Noticia?');
}
</script>

(.......)
<form method="post" onSubmit="return validar_apagar2();" action="dest_agen.php">
....
<input type="hidden" id="xpto2" value="editar"/>      
<input id="botao2" type="submit"  name="aFazer2" value="Editar"/>
<input id="botao2" onClick="document.getElementById('xpto2').value='apagar';" type="submit" name="aFazer2" value="Eliminar_Evento" />
</form>
<script>
function validar_apagar2()
{
    if (document.getElementById('xpto2').value=='apagar')
        return confirm('Deseja apagar o Evento?');
}

</script>

You need to be more precise when you say its not working. You either need to paste a working example here or try to put a lot of alert statements here and there in your code to see which part is creating problems for you.

I seem to remember that you can have only one set of script tags in the body. Put both functions in the same script tag pair.

ok i put both script in one tag pair and it doesn´t work...

to be more precise the second form when i prees the button eliminar_evento it doesn´t show me the message box that is the only problem...

You must have made changes to your original code. Post the most recent, working code as it is.