JavaScript - Random Function - Randomise Questions

Hi there!

I'm trying to retrieve the integer value in the string: #10
So I'm using the JS Split function

Code:

<script type="text/javascript">

var str="#10";
document.write(str.split("#"));

</script>

Is the code I'm using, but I keep getting a comma before my result..
in this case, my result is ",10"

What should I do?
Thanks!

Kind Regards
Matthew

P.S. I know that it's an array, but is there still anyway for me to get rid of the comma?

Sorry about the title, I didn't know what else to use to describe my problem.

Basically, I'm generating a random word with a function; then I'm trying to pass this word down to another function. The problem is, when I pass the word, it changes each time (due to it being randomly generated originally).

I'm only calling the function once (via button click), but I'm also calling the function in my code lower down to retrieve the returned variable; and the function seems to be running again and returning a new word from my array.

Here's a snippet of my code:
Code:

function ranNum(){
	var ranNum = Math.round(Math.random()*10);
		var chosenWord = wordArray[ranNum];
			return chosenWord;
}

function makeBoxes(x){
//remove children when new word is chosen
var hM = document.getElementById("hangMan");
	while(hM.firstChild){
		hM.removeChild(hM.firstChild);
	}	
	
	var chosenWord = ranNum(x);
		var wL = chosenWord.length;

		//create box for length of letters in word
		var i = 0;
		for(i=0;i<wL;i++){		
			var cBoxes = document.createElement("div");
				cBoxes.className = "letterBoxes";
					cBoxes.innerHTML = chosenWord.charAt(i);
						hangMan.appendChild(cBoxes);
				}
				
		return chosenWord;
}

function checkLetter(y){
	var chosenWord = makeBoxes(y);
		alert(chosenWord);
}

So I generate a word with one button; now I need to be able to work with said word in my checkLetter() function. The word changes however.

Any help would be greatly received.

I've looked for a solution to this issue, but it seems like a little different scenario than other situations.

I made a system for generating friend requests on Facebook. I have a grid that is 6 x 3, for a total of 18 cells. Each cell has a picture in it, and the picture is linked to the Facebook friend request page. My problem is that since each cell is populated at random from the array, I'm getting lots of repeats. For example, some picutures are in 5 cells, and some are in none. I'm trying to figure out how to make it so that once a picture is used once in the grid, it does not get used again in the same grid. I still want every cell filled at random on each page load, I just want to prevent the repeating.

Here's my current code:
Code:

<script type="text/javascript">
var vip_list=new Array(
	new Array('http://profile.ak.fbcdn.net/v225/1616/88/s1220771654_2158.jpg','http://www.facebook.com/addfriend.php?id=1220771654'),
	new Array('http://profile.ak.fbcdn.net/v223/1233/29/s904885342_9055.jpg','http://www.facebook.com/addfriend.php?id=904885342'),
	new Array('http://profile.ak.fbcdn.net/v229/1574/66/s1752031238_626.jpg','http://www.facebook.com/addfriend.php?id=1752031238'),
        new Array('http://profile.ak.fbcdn.net/v223/768/71/n661155042_7325.jpg','http://www.facebook.com/addfriend.php?id=661155042'),
	new Array('http://profile.ak.fbcdn.net/v226/732/26/n1827289885_2478.jpg','http://www.facebook.com/addfriend.php?id=1827289885'),
     new Array('http://profile.ak.fbcdn.net/v229/1631/70/s1425313768_1140.jpg','http://www.facebook.com/addfriend.php?id=1425313768'),
     new Array('http://static.ak.fbcdn.net/pics/s_silhouette.jpg','http://www.facebook.com/addfriend.php?id=1667023416'),
     new Array('http://profile.ak.fbcdn.net/v225/1146/29/s506485704_9532.jpg','http://www.facebook.com/addfriend.php?id=506485704'),
     new Array('http://profile.ak.fbcdn.net/profile6/270/32/s692160490_8745.jpg','http://www.facebook.com/addfriend.php?id=692160490'),
     new Array('http://profile.ak.fbcdn.net/v229/114/83/s1218176198_7375.jpg','http://www.facebook.com/addfriend.php?id=1218176198'),
     new Array('http://profile.ak.fbcdn.net/v226/946/4/s1470171885_4973.jpg','http://www.facebook.com/addfriend.php?id=1470171885'),
     new Array('http://static.ak.fbcdn.net/pics/s_silhouette.jpg','http://www.facebook.com/addfriend.php?id=1329505888'),
     new Array('http://static.ak.fbcdn.net/pics/s_silhouette.jpg','http://www.facebook.com/addfriend.php?id=1325496968'),
     new Array('http://profile.ak.fbcdn.net/v223/1546/92/s1536913202_2017.jpg','http://www.facebook.com/addfriend.php?id=1536913202'),
     new Array('http://static.ak.fbcdn.net/pics/s_silhouette.jpg','http://www.facebook.com/addfriend.php?id=1624715433'),
     new Array('http://profile.ak.fbcdn.net/v228/1282/58/s713998257_3682.jpg','http://www.facebook.com/addfriend.php?id=713998257')
);

var chosen_vip=Math.floor(vip_list.length*Math.random());
var chosen_vip1=Math.floor(vip_list.length*Math.random());
var chosen_vip2=Math.floor(vip_list.length*Math.random());
var chosen_vip3=Math.floor(vip_list.length*Math.random());
var chosen_vip4=Math.floor(vip_list.length*Math.random());
var chosen_vip5=Math.floor(vip_list.length*Math.random());
var chosen_vip6=Math.floor(vip_list.length*Math.random());
var chosen_vip7=Math.floor(vip_list.length*Math.random());
var chosen_vip8=Math.floor(vip_list.length*Math.random());
var chosen_vip9=Math.floor(vip_list.length*Math.random());
var chosen_vip10=Math.floor(vip_list.length*Math.random());
var chosen_vip11=Math.floor(vip_list.length*Math.random());
var chosen_vip12=Math.floor(vip_list.length*Math.random());
var chosen_vip13=Math.floor(vip_list.length*Math.random());
var chosen_vip14=Math.floor(vip_list.length*Math.random());
var chosen_vip15=Math.floor(vip_list.length*Math.random());
var chosen_vip16=Math.floor(vip_list.length*Math.random());
var chosen_vip17=Math.floor(vip_list.length*Math.random());

document.write('<center>');
document.write('<a href="',vip_list[chosen_vip][1],'" target="_blank"><img src="',vip_list[chosen_vip][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip1][1],'" target="_blank"><img src="',vip_list[chosen_vip1][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip2][1],'" target="_blank"><img src="',vip_list[chosen_vip2][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip3][1],'" target="_blank"><img src="',vip_list[chosen_vip3][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip4][1],'" target="_blank"><img src="',vip_list[chosen_vip4][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip5][1],'" target="_blank"><img src="',vip_list[chosen_vip5][0],'" height="60" width="60"></a>');
document.write('<br>');
document.write('<a href="',vip_list[chosen_vip6][1],'" target="_blank"><img src="',vip_list[chosen_vip6][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip7][1],'" target="_blank"><img src="',vip_list[chosen_vip7][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip8][1],'" target="_blank"><img src="',vip_list[chosen_vip8][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip9][1],'" target="_blank"><img src="',vip_list[chosen_vip9][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip10][1],'" target="_blank"><img src="',vip_list[chosen_vip10][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip11][1],'" target="_blank"><img src="',vip_list[chosen_vip11][0],'" height="60" width="60"></a>');
document.write('<br>');
document.write('<a href="',vip_list[chosen_vip12][1],'" target="_blank"><img src="',vip_list[chosen_vip12][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip13][1],'" target="_blank"><img src="',vip_list[chosen_vip13][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip14][1],'" target="_blank"><img src="',vip_list[chosen_vip14][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip15][1],'" target="_blank"><img src="',vip_list[chosen_vip15][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip16][1],'" target="_blank"><img src="',vip_list[chosen_vip16][0],'" height="60" width="60"></a>');
document.write('<a href="',vip_list[chosen_vip17][1],'" target="_blank"><img src="',vip_list[chosen_vip17][0],'" height="60" width="60"></a>');
document.write('<br>');

</script>

Any suggestions?
Thank you!

Hi again, I have 2 new questions for you all!

1.) *RESOLVED*

2.) So in this form:

Code:

<form name="form" action="email.php" method="post">

<div id="dynamicInput">
<br> <input type="checkbox" name="1" /><input type="text" name="i[]">
</div>

<input type="button" value="Add another text input" onClick="addInput('dynamicInput');">
<br>

<input name="email" type="text"> <br />
A12098 <input name="verify" type="text">
<input name="submit" type="submit">
</form>

I have a button that will add a form element to the form. In this case, it adds a checkbox and a text box. The name on the checkbox goes up from 1-30 (thats the max amount of fields that can be added) and the text box has a name of i[]. Is it possible for the user to click on the checkbox and the corresponding text box (the one next to the checkbox) will be disabled so editing is stopped? Then they could un-click it and it would be editable again.

Thanks in advance!

1. I am in the midst of making a website and doing a few things but am thinking of adding a log in section for members can i put a password directly on a video file? or do i have to do it to the page?

2. Also looking for a good provider to upload my site to, what does everything suggest for this?

Thanks

JavaScript functions must be called:
A. from the server
B. implicitly
C. explicitly
D. A and C, but not B.
E. None of the above.

JavaScript commands written outside of a function will be executed:
A. by the server.
B. implicitly.
C. explicitly.
D. never, they are ignored.
E. None of the above.

The best loop for iterating through an array is
A. Enhanced For loop
B. While
C. Do Until
D. Do While.
E. None of the Above.

JavaScript Arrays are always passed to functions?
A. By Reference.
B. By Value.
C. Globally.
D. As a string.
E. None of the Above.

The best way to execute JavaScript code when you first bring up a page is:
A. onload event
B. JavaScript code outside of any function.
C. onstart event.
D. All of the above.
E. None of the Above.



Write a JavaScript function to handle a callback:

Assume the following input fields:

<input type="text" id="lastName" name="lastName" />
<input type="text" id="firstName" name="firstName" />
<input type="text" id="phone" name="phone" />
<input type="text" id="email" name="email" />

A callback function will receive a pipe delimited string from the server as such:

Last-name|first-name|phone#|email

Example: Doe|Jane|415-555-1212|jane.doe@gmail.com

The callback function is:

function customer_Callback ( content )
{
// use the split method to convert content to an array.
// use document.getElementById() to get each of the above input fields.
// populate from the array.
}


-----------------------------------------

I am having serious trouble with these problems, I beseech you! There will be a special prize to whoever answers correctly all these questions first. Thanks!

Hi All

I have a xml string located in a hidden textbox that i need to parse

how do i get it into a xml object I thought nievly i could

xmlDoc = document.getElementById("XML").value

alert(xmlDoc.getElementsByTagName("SupplMets")[0]);
document.write("<table border='1'>");


but obviously i need to do some more work to get it into an xml object ...any ideas

the end goal here is to get the data in the xml into a table



here is what the xml string looks like

<SupplMets TumorSupplementalId="272341"><SupplMet TumorSupplMetsId="109130" SiteOfMetastasis="C020" DateOfMetastasis="20010101" MetastasisIdType="" MetastasisEliminated="" MetastasisSD="02-003710" /></SupplMets>

I am newbie in javascript. While being studying it I have not understood some concepts well.

JS is prototype-based language, as in Java it has one main prototype Object, also there are some other widely used object, like Array, RegEx, String ...... . So I can access and inherit from this objects/prototypes. So the questions is where do this object (declarations) are stored ? They are also allocated in memory ? Or when JS sees that there is declaration of some object is present i script it reads from file or whatever ? When I am using Function with key word new, what happens. As far as function is also object, it has field prototype and when calling this function with new it returns object of prototype type ? Am I right ? So if I haven't specified prototype it will returns object of Object type ? How does javascript knows about real type of variable. For example when I use regexp, it has method exec. I can call it on every variable. But I guest if variable doesn't have this field it returns undefined ? So the question is how does JS determine what real type of variable is ? Where this information is stored ? Closure in JS. I don't understand this concept well. I think of it like reference count in Java (used or been used by Garbage Collector). If we have a least one reference to variable it will still exist and it doesn't matter where it was declared. So making getter method inside another func makes it exists in memory. If I am wrong please give good explanation of this. Does JS runs in its own virtual machine like Java ? Or browser plays this role. I guess if it has GC, since one process cannot access address space of another process it should be something like virtual machine which controls memory allocation.

I would be very grateful for help. Thx in advance.





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01-21-2015, 10:44 AM #2
Dormilich View Profile View Forum Posts

Senior Coder Join Date Jan 2010 Location Behind the Wall Posts 3,532 Thanks 13 Thanked 372 Times in 368 Posts

Questions About Javascript - JavaScript | Dream.In.Code

Hi, I am currently having a problem with my code. It is pointing at a logical error somewhere as neither the error console in FireFox nor Firebug can detect any errors. The problem is getting the alert box to pop up when the user types in invalid letters or numbers for their respective functions. I guess it could be the Unicode coding for Internet Explorer or Mozilla, or maybe the validation is not getting called from the option list....Anyway here's my code so far:



<script type="text/javascript">
/* <![CDATA[ */

function validateAlphabetic(keyPressEvent) {
if (navigator.appName == "Microsoft Internet Explorer")
var enteredKey = keyPressEvent.keyCode;
else if (navigator.appName == "Netscape")
var enteredKey = keyPressEvent.charCode;
var enteredChar = String.fromCharCode(enteredKey);
var retValue = true;
try {
if (!/\D/.test(enteredChar) && !/\W/.test(enteredChar))
throw "You did not enter an alphabetic value.";
}
catch(inputError) {
window.alert("You can only enter letters into this field.");
retValue = false;
}
finally {
return retValue;
}
}
function validateNumeric(keyPressEvent) {
if (navigator.appName == "Microsoft Internet Explorer")
var enteredKey = keyPressEvent.keyCode;
else if (navigator.appName == "Netscape")
var enteredKey = keyPressEvent.charCode;
var enteredChar = String.fromCharCode(enteredKey);
var retValue = true;
try {
if (!/\d/.test(enteredChar) && !/\W/.test(enteredChar))
throw "You did not enter a numeric value.";
}
catch(inputError) {
window.alert("You can only enter numbers into this field.");
retValue = false;
}
finally {
return retValue;
}
}

/* ]]> */
</script>
</head>

<body>
<h1>Challenge Questions</h1>
<form action="" enctype="application/x-www-form-urlencoded">
<select>
<option value="maiden" onkeypress="return validateAlphabetic(event)">What is your mother's maiden name</option>
<option value="pet" onkeypress="return validateAlphabetic(event)">What is the name of your favorite pet?</option>
<option value="city" onkeypress="return validateAlphabetic(event)">What city were your born in?</option>
<option value="security" onkeypress="return validateNumeric(event)">What is your social security number?</option>
<option value="siblings" onkeypress="return validateNumeric(event)">How many siblings do you have?</option>
</select><br />
<input type="text" size="25" />
</form>

</body>
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I know that global variables are properties of the window object... so does that mean that local variables are properties of the function they belong to? And does that mean that functions are methods of the window object and that nested functions are methods of the function they belong to?

Lately I've been doing some modding for a game called Minecraft which requires some programming in Java. I've been doing a lot of research but because I can't think of a simplified version of my questions it's hard to get any results from Google. So I'm hoping someone could answer these for me. If you can't, I would even appreciate being pointed in the right direction or led to some reading material that would answer these questions for me.

1) How can I add the value of a variable onto the name of another variable.
For instance, I have this line of code
Code:

EntityItem entityitem = new EntityItem(world, (float)i + f2, (float)j + f3, (float)k + f4, new ItemStack(Item.ingotIron));

and this variable that will always be a number
Code:

private int numberA;

I would like to add the value of numberA onto entityitem. So if numberA was 1 entityitem would become entityitem1.

2) What is the best variable type to store values such as Item.coal, which is an object within the game? Would a String type suffice?

3) Using the same code above:
Code:

EntityItem entityitem = new EntityItem(world, (float)i + f2, (float)j + f3, (float)k + f4, new ItemStack(Item.ingotIron));

How could I use a variable's value where Item.ingotIron is? I tried some different things but the compiler threw "ItemStack doesn't exist" or some error along those lines at me.

For instance if variableA's value is Item.coal, how could I use that variables value where Item.ingotIron is.
Code:

EntityItem entityitem = new EntityItem(world, (float)i + f2, (float)j + f3, (float)k + f4, new ItemStack(variableA));

I appreciate your time and help on this issue and anything you can provide will be greatly appreciated.

I am not understanding something here with this:

http://www.w3schools.com/jquery/jquery_ajax.asp

Code:

<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
  $("button").click(function(){
    $("div").load('test1.txt');
  });
});
</script>
</head>
<body>

<div><h2>Let AJAX change this text</h2></div>
<button>Change Content</button>

</body>
</html>

When you click on the button, AJAX changes the text :

Code:

Let AJAX change this text

to:

Code:

AJAX is not a programming language.

It is just a technique for creating better and more interactive web applications.

My question is, where is this text above located since it's not in the code? Also, if I wish to change the text mentioned, how can I do so please?

1. I want to make form with 2 select filds that one of them will be disabled if in the first the use choose a specific option
i wrote it in this way (but its not work)
how I fix it?

Code:

<script type="text/javascript">


function itay() {
if (document.some1.one.value="x")
	document.some1.two.disabled=true
if (document.some1.one.value="y")
	document.some1.two.disabled=false
}

</script> 

</head>
<body bgcolor="#FFFFFF">
<form name="some1">
<table>
	<tr>

		<td> <select id="one" onclick="itay()">
  			 <option value="x">x</option>
 			 <option value="y">y</option>
		        </select>
                </td>
		<td> <select id="two">
  			 <option value="a">a</option>
 			 <option value="b">b</option>
		        </select>
                </td>
	
	</tr>
</table>
</form>

2. I want that after u fill the form and press submit u will see a txtarea with all the options u selected (for confirm that you chose the right things) and then press submit agien and get all the things u saw in the txtarea to a Email.
(Hope u understand )
so how I do it?

Hey everyone. I am very new at JavaScript and I need some help. I want to have a section on my home page where a person can choose a bike by clicking on a couple of arrows on the right and left ends of the bike. I want something similar to this type of program.

http://qlpros.com/

I don't want a border around the bike. I have been looking for a couple hours now and I haven't found anything. Any help would be much appreciated!!

My other question is how to transfer javascript to an external style sheet in dreamweaver.

Thanks!!