01-27-2012
Validation of Text field while Click on submit button
I am using Perl CGI. I have created some text fields and getting those values.
But i want if user leave the text field blank when he click on submit button then instead of run a script it should give a popup. Please any body suggest me something..???
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alert(3alleg4) Allegro manual alert(3alleg4)
NAME
alert - Displays a popup alert box. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int alert(const char *s1, *s2, *s3, const char *b1, *b2, int c1, c2);
DESCRIPTION
Displays a popup alert box, containing three lines of text (s1-s3), and with either one or two buttons. The text for these buttons is
passed in `b1' and `b2' (`b2' may be NULL), and the keyboard shortcuts in `c1' and `c2' as ASCII value. Example:
if (!exists(CONFIG_FILE))
alert(CONFIG_FILE, "not found.", "Using defaults.",
"&Continue", NULL, 'c', 0);
RETURN VALUE
Returns 1 or 2 depending on which button was clicked. If the alert is dismissed by pressing ESC when ESC is not one of the keyboard short-
cuts, it treats it as a click on the second button (this is consistent with the common "Ok", "Cancel" alert).
SEE ALSO
alert3(3alleg4), gui_fg_color(3alleg4), exgui(3alleg4), expackf(3alleg4), exspline(3alleg4)
Allegro version 4.4.2 alert(3alleg4)