prompt window value to alert window problem

cruzzer

New Member

Join Date: Apr 2010

Posts: 1
#1

prompt window value to alert window problem

Apr 29 '10, 04:55 AM

I need to know how can I exclude a data item from the Alert Window’s list message if the user leaves a prompt window blank.

Example :
If the user types a value to both “idnumber” and “departmen t” prompt but leaves the “access” prompt empty or clicks cancel, I want the Alert Message List to look…

LIKE THIS:
ID Number: “value”
Department: “value”

and …

NOT LIKE THIS
ID Number:”value”
Access Code: null
Department: “value”

NOR LIKE THIS:
ID Number: “value”
Access Code: undefined
Department: “value”

Code:

<head> <script type="text/javascript"> function Information() { idnumber = window.prompt("Type your ID Number", ""); access = window.prompt("Type your Access Code", ""); department = window.prompt("Type your Department", ""); window.alert( "ID Number: " + idnumber + '\n' +"Access Code: " + access + '\n' +"Department: " + department + '\n' ); } </script> </head> <body> <script type="text/javascript"> information(); </script> </body> </html>

Last edited by Dormilich; Apr 29 '10, 05:39 AM. Reason: please use [code] [/code] tags when posting code
Tags: alert, list, prompt, window

gits

Recognized Expert Moderator Expert

Join Date: May 2007
Posts: 5390

Apr 29 '10, 10:34 AM

a simple if-statement like in the following example would do the job:

Code:

function Information() {
    var idnumber = window.prompt("Type your ID Number", "");    
    var access = window.prompt("Type your Access Code", "");
    var department = window.prompt("Type your Department", "");
    
    var message = '';

    if ( idnumber != null ) {
        message += 'ID number: ' + idnumber;
    }

    window.alert( message );
}

so if you cancel the idnumber-prompt then the alert should be empty.

kind regards

prompt window value to alert window problem

prompt window value to alert window problem

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