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Javascript Data Type Q&A » variable » value 1 

1. Checking if a variable contains a numerical value in Javascript    stackoverflow.com

In PHP, it's pretty easy:

is_numeric(23);//true
is_numeric("23");//true
is_numeric(23.5);//true
is_numeric(true);//false
But how do I do this in Javascript? I could use a regular expression, but is there a function for this?

2. How can I test whether a variable has a value in JavaScript?    stackoverflow.com

I want to test whether a JavaScript variable has a value.

var splitarr =  mystring.split( " " );
aparam = splitarr [0]
anotherparam = splitarr [1]
//.... etc
However the string might not have enough ...

3. How to access javascript variable value by creating another variable via concatenation?    stackoverflow.com

Please have a look on the following code -

var abc_text = "Hello";
var def_text = "world";

function testMe(elem) {
    var xyz = elem+"_text";
    alert(xyz);
}

testMe("abc");
testMe("def");
I am trying to ...

4. JavaScript: Get Argument Value and NAME of Passed Variable    stackoverflow.com

What I want to do is get the NAME of a variable passed to a function and the VALUE of that variable and only have to pass in one variable to ...

5. how to join the value of 3 variables and add them to a hidden field    stackoverflow.com

I have 3 variables and I was wondering how to join their values and add them to a hidden field,

   document.getElementById('my-item-name').value = meat.join("\t");
it works for 1 but when I ...

6. What's the best practice to transfer a variable value to javascript from server?    stackoverflow.com

I'm developing a pet project with jQuery. Now the application requires some variable value is transferred to client javascript when the page is loaded. I'm wondering what's the best practice to ...

7. Use variable value to get value stored in other variable    stackoverflow.com

I am trying to simplify some of the bookmarklets that I have created over the past few days and make them easier for people to use. One of my bookmarklets ...

8. Getting value GET OR POST variable using JavaScript?    stackoverflow.com

How to get value of the get or post variable on page load using JavaScript?

9. Setting a variable name with another variable value - Java Script    stackoverflow.com

I want to get a value from a variable then use that as the name for another variable. I got something like this:

var eval(BodyWeight[i]["ExerciseTitle"]) = BodyWeight[i]["ExerciseVideo"]; 
This is giving me an ...

10. TypeError when applying a textarea's value to a variable    stackoverflow.com

JavaScript

var textarea = document.getElementById("textarea").value;
HTML
<textarea id="textarea" cols="100" rows="10">du hello!</textarea>

11. value of variable has changed or not    stackoverflow.com

how to find whether a value of variable is changed or not in javascript .

12. can hidden variables value be accessed in a controller in MVC    stackoverflow.com

can we access the hidden variables values in a controller's ActionResult if the hidden variable's value is set in javascript?

13. Trouble with Using Value of a Variable    stackoverflow.com

I am quite new to Javascript. I am trying to use the ajaxupload plugin to make an upload work within a form. I figured out how to use the form with ...

14. Visual Studio showing {...} as value for Javascript variable in debugger    stackoverflow.com

Visual Studio 2010 shows '{...}' in the debugger as the value for a Javascript variable. The type is object. How can I view the contents of the variable? There's no expansion ...

15. Multiple variable in value    stackoverflow.com

I'm just learning JavaScript. What I am doing at the moment is on my contact form trying to pass values.

function calculate(){
    var dr1=document.getElementById('numimg');
    var resultdrop=document.getElementById('total');
 ...

16. Can you set a variable name equal to another variables value?    stackoverflow.com

I am interested in knowing if its even possible. One example is the variable already exists. foo = 1; var bar = 'foo'; if('foo' == 1)? Is there a way to ...

17. Access value of JavaScript variable by name?    stackoverflow.com

Hello it is possible to access the value of a JavaScript variable by name? Example:

var MyVariable = "Value of variable";

alert(readValue("MyVariable"));

function readeValue(name) {
     ....
}
Is this possible, so that ...

18. How to refer to a javascript variable in a value field?    stackoverflow.com

I'd like to refer to a variable ("special") in field later in the same script. I've gotten the variable to display with alert boxes and document.write, but don't now how to ...

19. Can setInterval store a value in a variable    stackoverflow.com

Look at this code

var count = 0, count2 = 0
setInterval(function() {
    // I wrote this on two lines for clarity.
    ++count;
    count2 ...

20. Change js variable value from code behind    stackoverflow.com

I am calling a a javascript function in c# code behind using ScriptManager. I need to change a variable's(used as default height of a div) value just before the call to ...

21. Javascript: How do constantly monitor variables value    stackoverflow.com

How do I constantly check a variables value. For example:

if(variable == 'value'){
dosomething();
}
This would work if I constantly looped it or something, but is there an efficient way of triggering that as ...

22. can i store a value returned by apex method in a javascript variable?    stackoverflow.com

Is it possible to store a value returned by a controller method into a javascript variable? i need to pass a date and sales qty from salesforce into flot library javascript to ...

23. how to add numarical values to javascript variable?    stackoverflow.com

I'm trying to add 1 to my JavaScript variable, but the following code is giving me an error:

var val1 = document.getElementById('<%= rng1.ClientID %>');
var val2 = val1.value + "1";
alert(val2.value);
How can I do ...

24. Output variable value for attribution in OpenLayers    stackoverflow.com

I would like to display a string (let's say 'blabla') on the OpenLayers map such that the string's position stays constant relative to the viewfram - i.e. it does not move ...

25. Returning values in Javascript    stackoverflow.com

I have a (hopefully quite simple) Javascript problem. I've search but found nothing that is really relevant to the problem. Basically I have a function (addToGlobe) that calls two other functions (codeAddressLat ...

26. Access value by post method in JavaScript to variable    stackoverflow.com

I stored a global string variable in JavaScript in page named "parent.aspx". I called a JavaScript function on button click event of the same page which opens another page ...

27. Variable value does not change why?    stackoverflow.com

Here's the code:

var popupFirstName;
PopupFirstNameButton.addEventListener('click', function(){
    popupFirstName = 'SomeValue';
});
When I alert(popupFirstName) in some other function it says undefined. How can I get the value?

28. How to keep track of a previous value within a method in JavaScript?    stackoverflow.com

I need to compare a current integer with a previous integar within a method. It seems like something like this should work, but it doesn't. Can someone tell me where the ...

29. javascript variable value as a link    stackoverflow.com

I have a variable and I would like to add a link for its value. This below example only returns the html. How can I make this a clickable link when ...

30. How to check `return value` or `other values which are not contained in variables` with javascript debugger    stackoverflow.com

I use javascript debugger of chrome.
How can I check the following values which are not contained in variables by using the debugger?

a + b of

function add(a, b) {
    ...

31. rgb value as variable    stackoverflow.com

How do I store a variable value in a rgb() ? I use this code which isn't working:

<script>
var R=200;
var colval="rgb(R,10,100)";
</script>
I want it to be like this:
<script>
var colval="rgb(200,10,100)";
</script>
but somehow it doesn't ...

32. how to set value to incremental variable name?    stackoverflow.com

HI i got 4 flash clocks, that show the different city times, and i am getting the different 4 city times from my php file. after i get new time and ...

33. C# - Get JavaScript variable value using HTMLAgilityPack    stackoverflow.com

I currently have 2 JavaScript variables in which I need to retrieve values from. The HTML consists of a series of nested DIVs with no id/name attributes. Is it ...

34. Shorthand for setting variable values    stackoverflow.com

I am trying to declare 2 variables to the same value ( false ). I tend to do this all over the place ( like, in almost every object I prototype )

var ...

35. learning javascript, need clarification on variables values    stackoverflow.com

I'm doing a JS tutorial and long story short, we have to get certain amounts of numbers and pass them to HTML table/cells with ids of "square". the code works but ...

36. Synchronization value of the variable in JavaScript    stackoverflow.com

I would like to show on my website some data, which should be changing every 30 seconds. However, when someone open my website and there is 18 seconds left to change, JS ...

37. JavaScript variables giving the correct value when stepped through using the console, but not otherwise    stackoverflow.com

I have a variable in a JavaScript constructor that appears to be set to the correct value when stepped through using breakpoints. However, when run without breakpoints, the variable (supposed ...

38. Get remote javascript variable value    stackoverflow.com

I got a script that searches a string in a javascript script located at an external (cross domain) HTML code (not as a .JS file, but written directly inside the HTML ...

39. web browser set javascript variable value    stackoverflow.com

Is there a way for me to get and set the values of JavaScript variables in a win form web browser so it can communicate with my application. The only way I ...

40. Change variable value using onchange    stackoverflow.com

I want to change the value of value using a change event listener. Is it possible? Here is my sample code:

<select name="select1" onchange="updatevariable(this.value)"> 
    <option value="2" >2</option>
<option value="15" ...

41. Capture the current value of a variable    stackoverflow.com

I have a variable myVariable which is continuously changing. At some point I want to capture the value of myVariable (not a reference to myVariable) into another variable myVariableAtSomePoint. Example code:

var myVariable ...

42. javascript debugging: Is there a way to break on a change of variable value?    stackoverflow.com

Similar to other questions here, like this one. Is there a way to break on the change of a variable value in any javascript debugger? (like IE Developer tools, Visual Studio, ...

43. JavaScript conditional - how to test if a variable matches any of a list of values?    stackoverflow.com

Does JavaScript have a convenient way to test if a variable matches one of many values? This is my code,

function Start()
{
    if(number==(0||3||6||8||9||11||13||14||15||18||19||22||23||25||27||28||31||34||43||46||47||49||54||58||59||62||63||68||71||74||75))
    {
    ...

44. JavaScript : Check if variable exists and if equal to value    stackoverflow.com

I have three pages utilizing the same code and on one of the pages this variable doesn't exist, on the other two the variable ticketType has a value of 1 or ...

45. Why couldn't I pass the value in javascript?    stackoverflow.com

for (id = 50; id < 100; id++)
{
    if($('#'+id).attr('class') == 'myField')  
    {
            ...

48. Dofunction before getting variable value.    codingforums.com

I am creating a slider and I want the buttons to dissapear when it gets to the ends. They currently do that but if I quickly click a button multiple times the slider will keep going. The problem is the variables are getting their values before the div moves. I want the move_animate function to completely finish before getting the values. ...

49. JS help with min/max variable values    codingforums.com

Hello, I am new here, and I will probably break some of the forum rules on accident and I apologize ahead of time, but please go easy on me. I have a problem with a question in a Javascript class I am taking currently. The book explains how to detect the smallest values the user inputs but does not explain how ...

50. Store value to several variables?    codingforums.com

I used the brackets only to separate code from reply text. As to the != operator, here is what I've done, but couldn't make it work: Code: if (oObjVisible.allOverlays===true) { // oObjVisible.allOverlays is logical data type. //tried to change it to: if (oObjVisible.allOverlays != false) { But that never worked. Later on, I read in Wikipedia that there is the !== ...

51. Getting the Value of a Variable    codingforums.com

52. Trouble getting variable values to display    codingforums.com

I am fairly new to coding HTML with Javascript. I am hitting my head onto the table because i cannot figure out how to pull the variable value out in a document.write statement. Basically, I am calling a function to give me a random number between 1-4. I use that randomNumber to attach to different .jpg, descriptions, and URL's. So far, ...

53. javascript setting value of hidden variable    codingforums.com

hola '; echo ''; } ?> Untitled Document

79. increment hidden variable value    devnetwork.net

80. maintining value of variables in javascript    devnetwork.net

JSP, like ASP & PHP, all run on the server - the client never sees or knows about it. There is no way to use only Javascript to pass variables between pages. You could use Javascript to change some form values & submit a form to get around between pages. You can also use Javascript to access cookies, which might be ...

82. How to set new values to a Variable.    phpfreaks.com

if($_GET['do']=='rate'){ // do rate rate($show, $_GET['id']); } else if($_GET['do']=='getrate'){ // get rating getRating($show, $_GET['id']); } // function to retrieve function getRating($show, $url){ $rs=@mysql_fetch_array($result); // set width of star $rating = (@round($rs[value] / $rs[counter],1)) * 20; echo $rating; } // function to insert rating function rate($show, $url){ global $dbh; $text = strip_tags($_GET['']); $update = "update `" . $show . "_episodes` set counter ...

83. how to get a text field value into javascript variable    phpfreaks.com

I have a html form. i have the fields like username,password,firstname,address. I have placed the username inside another form because onblur event this textfiels value should b recieved by the js. But js is not recieving the value.Gives the error'document.usercheck.username is null or nota an object. My code is function stamp() { document.write("

94. adding an attribute's value to a variable    sitepoint.com

adding an attribute's value to a variable i have the following script: Code: var iteration = 0; function AddToIngList (form, iteration) { var it = iteration; var Ingredient = form.ingredienttoadd.value; form.ingredients_added.value += Ingredient + "\n"; var objHTML, objText, objinput, objLink; objHTML = document.createElement('P'); objHTML.setAttribute('NAME', 'txtTest'+1); objHTML.setAttribute('ID', 'txtTest'+1); var strTest = form.ingredienttoadd.value; objText = document.createTextNode(strTest); objinput = document.createElement ('INPUT'); objinput.setAttribute('TYPE', 'text'); objinput.setAttribute('NAME', ...

95. Javascript variables not applying values    sitepoint.com

function loadOrbMenu() { menu = document.getElementById("orb_menu"); menuTitles = menu.getElementsByTagName("h6"); subMenus = menu.getElementsByTagName("ul"); for (var i = 0; i < menuTitles.length; i++) { menuTitles[i].onclick = function() { toggleOrbMenu(menuTitles[i].id, subMenus[i].id); }; } } function toggleOrbMenu(titleID, menuID) { title = document.getElementById(titleID); menu = document.getElementById(menuID); if (title.className == "collapsed") title.className = null; else title.className = "collapsed"; if (menu.className == "collapsed") menu.className = null; else menu.className ...

97. Variable called 'value'?    sitepoint.com

98. Detecting resolution to store variable value    sitepoint.com

Hi all, I am a little confused and am wondering how to get around this problem... Bascailly I want to detect the users resolution so and store a value to determine what style sheet they use. e.g If (screen.width <="800") { $var="style1.css; }else{ $var ="style2.css" } Any ideas, I'm not too strong on javascript at the mo, so any advice accepted. ...

99. HOW TO? Split 100px into two variables with the values '100' and 'px'    sitepoint.com

Hi vgarcia, Thanks for your help... After my original post i tackled the problem again in the same way you suggested.. . I came up with the following solution.. what do you think?? Is there a better way?? // parse the elements width and height returning only an integer value var widthUnit = parseInt(eSelected.style.width); var heightUnit = parseInt(eSelected.style.height); // create regexp ...

100. Using a variable instead of a concrete value!    sitepoint.com

Using a variable instead of a concrete value! Hello Everyone, I am currently developing a small script that will open a "Help Dialog". The "Help Dialog" is created using the handy 'window.open()' function. Simply opening a window which has been provided with concrete attribute values is easy, e.g.: window.open('helpdialog.htm','Help','height=200, width=200'); However I am interested in setting the height, width, screenX and ...

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