URGENT: match method

[alsaffar]

Hi there,

I'm lost in the 'match' method I read and read and read about it but STILL can not figure how to build the argument of the characters to be compared!

I want the text input box to accept only english characters and numbers and a dash, how can I do it? Following is a part from my script:

CompareArgument = /-|[abcdefghijklmnopqrstuvwxyz]|[1234567890]/;

if (TextInput.value.match(CompareArgument))
alert ('OK');
else
alert ('NOT');

Please help.

If you need the full script please tell me

Thanx in advance

 

[theboyhope]

Try /^[a-zA-Z0-9\-]+$/;

HTH.

 

[Westbury]

This certainly isn't he most elegant way of doing it. But im not too good with regular expression matching. I think this will do what you want.

The problem with your code is that it was saying it was ok if ANY part of the string matched. I dont know how to say "only if it all matches" in a pattern so I'm just going through each character and seeing if that matches... if it doesn't set and flag to say its not ok.

var CompareArgument = /-|[a-z]|[0-9]/;
	var ok = true;

	for(var i = 0; i<TextInput.value.length; i++)
	{
		var myChar = TextInput.value.charAt(i);
		myChar = myChar.toString();
		if (!myChar.match(CompareArgument))
		{
			ok = false;
		}
	}

	if(ok)
	{
		alert("OK!");
	} else {
		alert("NOT OK!");
	}

Hope that at least points you in the right direction.

Westbury

If it aint broke, redesign it!

 

[stewartwebb]

You could try it another way. The way i'd do it is by checking each character in a for loop, try this.

function checkValCorrect()
{
var valCorrect = true;
TextInput = document.formName.fieldName.value;
for (i=0; i<TextInput.length; i++)
{
Char = TextInput.charAt(i);
if (Char.match(/[abcdefghijklmnopqrstuvwxyz1234567890]/))
{
continue;
}
else
{
valCorrect = false
}
}
if (valCorrect == true)
{
alert ('OK');
}
else
{
alert ('NOT');

}
}

hth

Stewart

 

[jemminger]

the match() method returns an array of matches to the pattern, or null. if you just want to see if your input matches the pattern, use pattern.test(string)

CompareArgument = /^[a-z0-9\-]+$/ig;

if (CompareArgument.test(TextInput.value))
  alert ('OK');
else
  alert ('NOT');

=========================================================
-jeff

http://www.jeffemminger.com

try { succeed(); } catch(E) { tryAgain(); } finally { rtfm(); }