Validation

[helraizer1]

I have a page with a form, the form has 3 text fields

"tireqty"

"oilqty"

-and-

"sparkqty"

and a button. The form action goes to a php page that I made, in which is validation, for whether or not the user inputted any data into each field.

<?php
if( $tireqty == "")
{
     echo "<script> alert ('You did not enter a number of tyres to order!'); history.go(-1); </script>";
}
else .....
 

etc.. so it does each input field seperately

^ This is ok but not fool proof.

Would it be possible to add Javascript to the first page (with the form) so that when you press the button, or on the 'onchange' function for each input/text box, it'd check the value of the text fields to make they are in number format and get the value is existant, similar to the PHP code above.

Would that be possible and what code would I need?

Hope that was clear enough, if not tell me and I'll try and rephrase.

Thanks,
Sam

[rpnew]

I have a page with a form, the form has 3 text fields

"tireqty"

"oilqty"

-and-

"sparkqty"

and a button. The form action goes to a php page that I made, in which is validation, for whether or not the user inputted any data into each field.

<?php
if( $tireqty == "")
{
     echo "<script> alert ('You did not enter a number of tyres to order!'); history.go(-1); </script>";
}
else .....
 

etc.. so it does each input field seperately

^ This is ok but not fool proof.

Would it be possible to add Javascript to the first page (with the form) so that when you press the button, or on the 'onchange' function for each input/text box, it'd check the value of the text fields to make they are in number format and get the value is existant, similar to the PHP code above.

Would that be possible and what code would I need?

Hope that was clear enough, if not tell me and I'll try and rephrase.

Thanks,
Sam

Hi Sam,

yes you can add the Javascript to work on with this in that way without submitting you can do validation.. if you are making a form then you can call this javascript function on form submit event or button click event or from whatever event you want from... just search on google and you'll get many examples regarding this....

RP

[gits]

hi ...

of course you may add a javascript function to your page that validates the values of your fields on submit:

function validate_fields() {
    var fields = { 'tireqty': 1, 'oilqty': 1, 'sparkqty': 1 };
    var val = true;
 
    for (var i in fields) {
        var field_value = document.getElementById(i).value;
 
        if (field_value === '' || isNaN(field_value)) {
            val = false;
            break;
        }
    }
 
    return val;
}

and in your html you should have:

[HTML]<form name="whatever" onsubmit="return validate_fields();">[/HTML]
kind regards