JavaScript - Regular Expression Detect Words 4 Or Fewer Letters

Hello,

How can i validate string with alphanumeric, space, dash and dot in regular expression ?

Hi all, I have this line (part of a larger function that converts a few common BBCodes into HTML) and I don't know how to do one thing. First, here's the line:

Code:

str.replace(/\[color=(.*?)\](.*?)\[\/color\]/gi,'<span style="color:$1;">$2</span>');

It works fine if I do this (I'll mis-spell "color" to prevent messing up the board):

THIS works fine.....
[colur=#ff0000]Red Text[/colur]

But of course, if I do this:
[colur="#ff0000"]Red Text[/colur]

It doesn't work.

What I need to do is take the $1 variable, AFTER it's captured, but BEFORE it's used, and strip out any quote marks I find. I may want to also strip out, then add the hash sign (#) also, then put it back so it works with or without the #.

While I'm at it, I'll also probably detect color as a hex string vs. a keyword (so that both "#ff0000" and "red" work) and probably also support the rgb() method.

But first I need to know how to access and modify $1 BEFORE it's used. I'm hoping that I don't need to use two lines (or two separate .replace() calls).

Thanks!

-- Roger

for the character classes [ ] ,
if i want to match ,.[] i cannot put them into the square brackets so how to deal with that? what if the characters are . or ! or ." (<-- combined) it fails if the regexp is [.!(.")] which will treat ( as one of the element.

also the book javascript: the definitive guide says that (?=p) requires that the following characters match the pattern p, but do not include those characters in the match. However, the browser failed to figure this out (IE8)
i.e. "asd:ert".match(/(?=\\w/) returns null

thx in advance

Hi,
Can someone fix the following regular expression? It is validating every thing expect YEAR. It only matches first 2 digits for year instead of 4. I want it to be 4 digits for a year. It returns true if I put 12/25/19.I want it to return false for the above date.

Code:

var RegExPattern = /^(?=\d)(?:(?:(?:(?:(?:0?[13578]|1[02])(\/|-|\.)31)\1|(?:(?:0?[1,3-9]|1[0-2])(\/|-|\.)(?:29|30)\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})|(?:0?2(\/|-|\.)29\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))|(?:(?:0?[1-9])|(?:1[0-2]))(\/|-|\.)(?:0?[1-9]|1\d|2[0-8])\4(?:(?:1[6-9]|[2-9]\d)?\d{2}))($|\ (?=\d)))?(((0?[1-9]|1[012])(:[0-5]\d){0,2}(\ [AP]M))|([01]\d|2[0-3])(:[0-5]\d){1,2})?$/;

Thanks

I have the following regular expression to test the validity of an input date:

Code:

([0-9][0-9]|[0-9])[\s/-]([0-9][0-9]|[0-9])[\s/-]([0-9][0-9][0-9][0-9]|[0-9][0-9])

It should allow 1 or two digits for the day of the month, then a separating character (" ", "/" or "-"), then 1 or two digits for the month, then 2 or 4 digits for the year.

Unfortunately it will accept anything above 2 digits for the year, which I understand why is happening but don't know how to fix! Can anyone help?

Thanks!

I want to validate a form with only numbers and "$" sign.
so far i know this
Code:

		currencyValue = which.value;
		var re = /^[0-9]*$/;
		if (!re.test(currencyValue)) {
		    alert("Value must be all numberic charcters, non numeric's removed from field!");
		    field.value = field.value.replace(/D/g,"");
		}

but how do I also add the "$" sign as ok?

I am trying to find the correct regular expression (or an alternate) for if a user enter any more than 1-3 digits in the age field of a form it produces an error message. I already have the error set up, just the correct coding to produce the 1-3 digit condition.
Thanks, KWIKCUCUMBER.

I want to find in all occurrences of #(...) in a string (what is between the parentheses is unknown. At the moment I have
Code:

str.match(/#\(.*\)/)

The problem is, I want to be able to have multiple of these in one string, like "#(hello) good #(world)", but RegExp takes me from the first '#', to the last ')'.

I want to allow nested parentheses, so I am thinking that there should be away to not let it look past the second '#'. How would I do this?

Hi i am using this form to validate my input
Code:

function validateForm() {
	var name = document.getElementById("name");
	var descp = document.getElementById("descp");
	var language = document.getElementById("language");
	var txtFileName = document.getElementById("txtFileName");
	var alphaNumExp = /^[a-zA-Z0-9 _-]+$/;
	var isValid = true;
	if ((name.value === "" || name.value.length < 1 || name.value.length > 30) && !name.value.match(alphaNumExp)) {
		isValid = false;
	}
	if ((descp.value === "" || descp.value.length < 1 || descp.value.length > 1000) && !descp.value.match(alphaNumExp)) {
		isValid = false;
	}
	if (language.value === "") {
		isValid = false;
	}
	if (txtFileName.value === "") {
		isValid = false;
	}
	
	document.getElementById("btnSubmit").disabled = !isValid;

}

for a form. It checks everything else correctly EXCEPT for the alpha numeric part. Any ideas?? I am new to JS writing on my own(just was using other's scripts)

I have a function that changes the label on a set of labels with similar "for" fields. Somehow, the matching is only matching every other label. I suspect I must be missing something obvious.

The goal is to change the text of a set of radio buttons to either "top" and "bottom" or "left" and "right" depending on orientation.

Code:

function ChangeLabels(orientation) {
	var lefttop = 	"Left";
	var bottomright = 	"Right";
    var lbls = document.getElementsByTagName("label");
    var lefttopregex = new RegExp ("Field6_[0-9]+", "gi");
    var bottomrightregex = new RegExp ("Field20_","gi");
    
    
    if (orientation == "Vertical") {
    	lefttop = "Top";
    	bottomright = "Bottom";
    }

  var forvalue = "";
  for (var i=0,k=lbls.length; i<k; i++) {
     	forvalue = lbls[i].htmlFor;
    
   	if (lefttopregex.test(forvalue)) {
      		lbls[i].innerHTML = lefttop;
    }
   	if (bottomrightregex.test(forvalue)) {
      		lbls[i].innerHTML = bottomright;
    }
     
  }	
	
}

And here is the HTML of the labels.

Code:

<li id="fo1li6" class="     ">
<label class="desc" id="title6" for="Field6_0">
Left/Top
<span id="req_6" class="req">*</span>
</label>
<div>
<input id="radioDefault_6" name="Field6" type="hidden" value="" />
<span>
<input id="Field6_0" name="Field6" type="radio" class="field radio" value="Dogs" tabindex="20" onchange="handleInput(this);"  checked="checked" />
<label class="choice" for="Field6_0" >
Dogs</label>
</span>
<span>
<input id="Field6_1" name="Field6" type="radio" class="field radio" value="Pineapple" tabindex="21" onchange="handleInput(this);" />
<label class="choice" for="Field6_1" >
Pineapple</label>
</span>
<span>
<input id="Field6_2" name="Field6" type="radio" class="field radio" value="Leaves" tabindex="22" onchange="handleInput(this);" />
<label class="choice" for="Field6_2" >
Leaves</label>
</span>
<span>
<input id="Field6_3" name="Field6" type="radio" class="field radio" value="Cat" tabindex="23" onchange="handleInput(this);" />
<label class="choice" for="Field6_3" >
Cat</label>
</span>
<span>
<input id="Field6_4" name="Field6" type="radio" class="field radio" value="Star" tabindex="24" onchange="handleInput(this);" />
<label class="choice" for="Field6_4" >
Star</label>
</span>
<span>
<input id="Field6_5" name="Field6" type="radio" class="field radio" value="Bamboo &amp; Sun" tabindex="25" onchange="handleInput(this);" />
<label class="choice" for="Field6_5" >
Bamboo & Sun</label>
</span>
<span>
<input id="Field6_6" name="Field6" type="radio" class="field radio" value="Bamboo" tabindex="26" onchange="handleInput(this);" />
<label class="choice" for="Field6_6" >
Bamboo</label>
</span>
<span>
<input id="Field6_7" name="Field6" type="radio" class="field radio" value="Sun &amp; Moon" tabindex="27" onchange="handleInput(this);" />
<label class="choice" for="Field6_7" >
Sun & Moon</label>
</span>
<span>
<input id="Field6_8" name="Field6" type="radio" class="field radio" value="Fleur de lis" tabindex="28" onchange="handleInput(this);" />
<label class="choice" for="Field6_8" >
Fleur de lis</label>
</span>
<span>
<input id="Field6_9" name="Field6" type="radio" class="field radio" value="Dragonflies" tabindex="29" onchange="handleInput(this);" />
<label class="choice" for="Field6_9" >
Dragonflies</label>
</span>
<span>
<input id="Field6_10" name="Field6" type="radio" class="field radio" value="No Design" tabindex="30" onchange="handleInput(this);" />
<label class="choice" for="Field6_10" >
No Design</label>
</span>
</div>
</li>

I'm trying to convert a line using a regular expression.

The re I am using is this: <div><span>&middot;<span>[\s*]<\/span><\/span>([^<]*)<\/div>

I'm using the expression in the replace function like this:

html = html.replace( /<div><span>&middot;<span>[\s*]<\/span><\/span>([^<]*)<\/div>/gi,'<li>$1</li>') ;

the line of code I am changing is like this:

<div><span>&middot;<span> </span></span>Illness - where a pupil is too ill to leave the house</div>

eg it should strip out the code and leave <li>Illness - where a pupil is too ill to leave the house</li>

it works fine here http://www.regular-expressions.info/...ptexample.html
but when used with the replace command it does not?

Can anyone see the problem?

(I'm trying to convert bullet points from word)

Darren

Me again, having some issues with the following code...

PHP Code:
if (str.match(regEx)) {
       alert("illegal character");
} 


regEx = /[^0-9a-zA-z]/g

I have tried typing in loads of strings, and nothing is causing the alert to work.

Edit: Fixed it, it seems the fix is:
regEx = [^0-9a-zA-z]

I thought you need the /. I also can't use any modifiers, although it works fine without them.

The following code removes the brackets and a dash from the string variable.
I am interested why there are \ in front of each bracket in the regular expression regexp?
The code work fine if regexp would be /()-/g;
So why then / is necessary? I would appreciate a lot with someone could explain.
Thank you very much.

<html>
<head>
<title>Regular Expressions</title>
<script type="text/javascript">
var string="(304)434-5454";
regexp=/[\(\)-]/g;
document.write(string.replace(regexp, ""));
</script>
</head>
<body>
</body>
</html>

Hi Guys,

I am new to this forum, and new to the coding world, hopefully you guys will be able to help me get a little bit further in my little project.

I am attempting to parse a string that is returned when I ask a device for some metadata information, now the information that is returned looks like this,

Code:

RESPONSE "<DIDL-Lite xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/" xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/"><item id="" parentID="" restricted="True"><dc:title>Una - Angels At My Door</dc:title><upnp:class>object.item</upnp:class></item></DIDL-Lite>"

,the part in bold and underlined is the piece of text I want, now previously I have done this with some framing, but that doesn't include the same characters multiple times.

Am I on the right track in believing using a Regular Expression Object is my solution ?

If so how do I go about that ? If someone could give me some advice or point me in the right direction it would be most greatly appreciated !

Thank you very much in advance !

I want a regular expression for Citi where first character should not be a blank space.

Thanks in advance