Special Symbol

[danasegarane]

Hi all,
I want to check any - symbol is present in the textbox.I am trying with this code.But this is not working.Can some one help.The condition is that it should contain only one hiphen symbol

function isHiphenpresent(value)
	{
		var j, k;
		for(j=0;j<value.length;j++) 
		{
			k = value.substr(j,1);
			if((k=='-'))
				;
			else
				return false;
		}
		return true;
	}

Thanks in Advance
Dana

[acoder]

Consider using regular expressions instead.

[danasegarane]

Thanks for your reply.
Can you give one example ?

Dana

[acoder]

Thanks for your reply.
Can you give one example ?

Dana

One possible example is:
[CODE=javascript]/^[^-]*(-){1}[^-]*$/[/CODE] If you need an explanation on how tis works, let me know.

See how to use regular expressions in Javascript here.

[danasegarane]

It will be better ,It you give the example with some explanation


Dana

[acoder]

One possible example is:
[CODE=javascript]/^[^-]*(-){1}[^-]*$/[/CODE]

The /'s denote a regular expression in Javascript.

The ^ at the beginning matches the beginning of the string. The ^ inside the square brackets is a negation, so [^-] matches everything besides a hyphen. The star means "match 0 or more times".

Then we match the actual hyphen, but only once ({1}). Then, we again match anything besides a hyphen 0 or more times. Finally, we match the end of the string with $.

Read the tutorial link for more information.

[danasegarane]

Thanks Acoder,
I wll read the tutorial and come back. :)

Dan