JS To Accept Only A Particular String To Start With An Alphabet Or Number Only?
Jun 4, 2009
I have a JS function which checks whether the directory field value entered starts with an alphabet or number only. Following is the code using regular expression.
function testpw() {
var un = document.getElementById("dir").value;
if (/^[^A-Za-z0-9]/.test(un)) { // only a-z0-9 allowed as first character
[code]......
method which only accepts "/ktp/knas/" as the starting value and anything after that. ie it should accept /ktp/knas/*, rest everything is not accepted.
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Jan 12, 2011
I need to restrict a range of values to a textbox. I have already the minimum and maximum value allowed in the textbox, but is missing me intermediate values.
An example: From the minimum value -2,00 to maximum value 0,00 it accepts: -2,00 | -1,75 | -1,50 | -1,25 | -1,00 | -0,75 | -0,5 | -0,25 | 0,00 From the minimum value 0,00 to maximum value 1,00 it accepts: 0,00 | 0,25 | 0,50 | 0,75 | 1,00
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Oct 23, 2011
I have been presented with: Draw a flowchart and write a javascript program which will accept two numbers from a user and will determine whether the second number is a factor of the first. This is determined by dividing the first number by the second and checking if the remainder is 0. This is made easier if you find out what the operator does. The output should be in the form 4 is not a factor of 6 and 3 is a factor of 6. I have tried a few attemps and yet still not sure what the problem is :confused:
[Code]....
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Feb 15, 2012
I need Javascript validations of :
1. 10 Digits cell number does not start with 0
2. Valid E Mail Address and
3. 6 Digits Pincode
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Oct 1, 2010
I have a requirement to generate a report (tabular view) which displays number of days by Month from Start Date to End Date. Also, total number of days that fall in the range in the corresponding year.
I am looking for a Javascript function as a solution to the above requirement but could not find one.
For example,
Start Date: 02/15/2007
End Date: 08/22/2010
Report should be as displayed in the attached text file.
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Jul 7, 2011
When I used toFixed() method on a number, I thought that this method round a number to a specified approximation, but I got a surprising result, the number became string! 15.23689.toFixed(2) ==> "15.24". So does it convert the number into string?
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Feb 15, 2007
I am creating a little html editor, and I want to highlight a chunk of
unformatted text, click a <buttonand put a <pand the beginning and
a </pat the end. I assume there is a DOM element relating to this,
can anybody help please ?
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Apr 16, 2011
I have to do something that looks an easy task, but I can't do it.I have a page with a div and an id= "livetimings" assigned to it, I want to show a table inside that div and update it every 20 seconds.I have a php script which prints the table and it works, I've tried that script by itself, now I'm trying to call it through an AJAX call in this way [code]inside the <body> tag I've put a setInterval() which starts the getTempi() every 20 seconds and it also works.The not working part is that nothing appears inside the div.I've put some alerts inside the JS code all of them before the req.open pop up, then nothing, so I think the problem is there, but I don't get it.script.php is in the same folder of the html page.The php script has an echo at the end which prints the html code for the table.
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Jul 21, 2011
I wanted to only match in the middle of a string
I have a string = " sdfasf 23234"
I wanted to get the numbers like /([0-9]*)/
But this fails and returns nothing because the string begins with letters. Instead I had to do /[a-zA-Z ]*([0-9]*)/
If that's the case then, why do we bother with something like
/^[a-zA-Z]*([0-9]*)$/
The pattern is already assumed to start at the beginning of the string
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Jul 23, 2005
I need to use javascript's graphics API to draw the letters of
the alphabet. If necessary, I can map out all 26 letters myself
and use drawline() to draw them, but I am hoping someone out
there might have a better suggestion. The user will click a spot
on the canvas, and the script will draw one of the letters at
that spot.
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Sep 30, 2010
Is there way to only match on strings starting with the first characters input?For instance, if I have a list as such:[ 'Tamara','Amy']when I start to type 'Am', I only want to see "Amy" in the drop down list, not "Tamara".I feel like this should be an easy configuration option or easy mod, but alas, I could not find it.
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Oct 7, 2009
I have a string stored in a variable var = "4.25 houses".
I would like to only extract the currency value, ie "4.25" from this. Is this possible? Also I would like to divide and multiply the new variable I get... does this number need to be converted or something?
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Jul 20, 2005
What would be the best way to convert a month number to its corresponding
string? I.e, 3 -> 'March'. Is there a builtin function or must I use a
lookup table or something?
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Feb 25, 2009
How to convert Number to String in Javascript.
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Sep 9, 2006
Now I need to convert a number(decimal) into a hex.string. I want to pass my blurit() two colors and have it start at color one and step its way to color two based on a determined step. I need to convert the new color to a hex string to be used to control the color of text. This is a rough example of what I am doing:
function blurit(color1, color2) {
colorstep= (color2-color1) /10; clr=color;
for (lp=0; lp<10; lp++) {
test.innerHTML+= '<font color="#' +dex(clr) +'">'
clr+= colorstep;
}}
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Mar 4, 2010
I have a string, an example below, I want to extract the number from it.
Code:
<p class="the-price">€15.00</p>
<p class="gbox"><!--<a href="#"><span>Arrange<br>
Cover</span></a>--></p>
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Apr 3, 2010
I'm trying to write code to swap images in a list. It's going to be a star rating control that highlights stars as you hover over a star. each image in the list has an onmouseover="highlight(this)" function and a unique id of 1 - 10.
Code:
function highlight(star) {
var num = Number(star.id);
for (i = 0; i < num; i++)
[Code].....
I'm trying to convert the number 'i' used by the for loop to a string so it can be used by the getElementById() method to select the stars to be highlighted. But my intellisense is telling me there is a problem with that line. I tried
var id = String(i+1);
but this didn't work either.
what have I gotten wrong?
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Jun 27, 2011
I have a string "Slide1.jpg"
I need to increment it by 1 to say "Slide2.jpg"
I have split and sliced but I keep getting SlideNaN.jpg
Rather then fix my mess of code... There has to be a simple way of doing this..
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Dec 1, 2011
I have a string:
Code:
var str = "6, 14, 2, 23, 121, 137, 342, 453, 543, 4, 762"
Var num = 2;
I want to check if num exists in str.
Is there any javascript function to do this?
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Aug 13, 2005
How can I check if a number exists by itself in this string by using
the RegExp object?
var mystring = "11,111,01,011";
var match = "1";
var re = new RegExp( match );
var isFound = re.test( mystring ) );
Running this code returns 'true' which is not what I want since number
one doesn't exist by itself. I need to use the "match" variable since
it will change depending on user input.
I can only get it to work without variables in the expression. E.g.
var re = new RegExp( /1/ );
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Sep 2, 2006
Javascript variables are loosely typed: the conversion between a
string and a number happens automatically. Since plus (+) is also
used as in string concatenation, `` Ƈ' + 1 '' is equal to `` ཇ' '': the
String deciding what + does. To overcome this, first convert the
string to a number. For example:
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Jun 12, 2007
if I have an array where the number are write in string format, how can I recognize when a string is in realty a number? example if I have this:
"50"
"house"
"light"
"100blue"
"yellow20"
"-100"
"20,5"
how can with a cicle to extract only:
50
-100
20,5
?
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Jul 20, 2005
I want to turn the string "100,144" to numbers, to use for
resizeTo(100,144) <--- here.
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Nov 24, 2011
How to check that a text field is a string not a number with javascript? Therefore,if the field is a number then I want to display a message that contain "You must enter a string".
var str = champ.value;
if (!(isNaN(str))) {
alert("Vous avez saisi un nombre");
I tried the previous code but it does not work.
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Dec 22, 2010
I have found this nice background rotator:
Code:
<style>
body
{
/*Remove below line to make bgimage NOT fixed*/
background-color:black;
background-attachment:fixed;
background-repeat: no-repeat;
[Code]...
when i run it, i have to wait the 9000 timer to c the first image, and i need the page to start with an image and then start the rotation, i have assigned background-image by css, and tried also to use document.body.background, but when i do this the rotator doesnt work.
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Oct 18, 2007
I'm looking for a way to grab a number from a string, although this number
is not at either end of the string.
Here is the string in question: var el = "v4Function_Name('argument3')"
Here is a substring that returns the number ( the 3 ) successfully...
var number = el.substring(el.lastIndexOf("ent")+3,el.length-2);
Seems very ineffecient to do it this way, and better to find a lean elegant
way using replace(); How does one go about getting a value inside of a
string with regular expressions? .. or is there a better way?
Here are a couple of the many expressions I have failed with...
var pat = /^[^ent][0-9]*$"/;
var pat = /v4Function_Name('argument([^0-9]+)'/;
var number = el.replace(pat,"");
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