HOW TO CHANGE A JAVASCRIPT FILE (.JS FILE) WITH EXTERNAL VALUES?
Question by chris wick:
How to change a Javascript File (.js file) with external values?
I need the code for the Javascript file that would enable it to be change with out chaning the JS file like Google adsense goes.
I just need it to change the background colour.
Example Code:
Thanks, Chris
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Answer by dhvrm
You need to know the variable in the external JS file that holds the background color. That variable needs to have global scope.
Assuming you properly identify the variable with global scope that holds the value, then you can simply reassign its value inb your JavaScript.
You then need to ensure no other functions or statements in the external JS file reassign the value to the background color variable.
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Know better? Leave your own answer in the comments!
about 1 year ago
First thing you should know is that PHP and HTML are diffferent. PHP is a background script that works BEFORE you view the page. HTML is WHAT you see on a page… like what you see on this right now is HTML, but the information loaded is from PHP.
PHP is a server-side language that retrieves (usually) information stored into a database.
HTML then edits, reforms, displays that data in a form that you please.
Also, PHP always starts with < ? or . If you have those, and have HTML, you must show the HTML in a PHP code called ‘echo’ or ‘print’.
However, if you have only html, then the php won’t show up, unless you include If you still don’t understand, you can review the site below, or just contact me with a more precise question. Your question here is quite broad.
** You cannot view working PHP files from your desktop unless you have the appropriate program, XAMPP is good for that. In order to see it, you need that, or just get a free site that supports PHP and MySQL (x10hosting.com or 000webhost.com) and paste your scripts there. That’s when you can truly test them. **
about 1 year ago
1. Copy your PHP code.
2. Open your HTML document.
3. Paste your PHP script into your existing HTML document. between the starting PHP tag – < ?php and the ending one - ?>
4. Save the file (Both the HTML and PHP) as yourfilename.php.
5. Upload to server and test.
So your document might look something like this:-
< !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
[Your HTML code]
< ?php
[Your PHP code]
?>
about 1 year ago
php is a server side application server. you have to have a php server installed on your web server in order for the .php scripts to be parsed.
about 1 year ago
Hello,
Please look over http://www.w3schools.com for PHP. This will point in the right direction.
There are two ways to use HTML on your PHP page. The first way is to put the HTML outside of your PHP tags. You can even put it in the middle if you close and reopen the < ?php -and- ?> tags. Here is an example of putting the HTML outside of the tags:
My Example
< ?php
//your php code here
?>
Here is some more HTML
< ?php
//more php code
?>
The second way to use HTML with PHP is by using PRINT or ECHO. By using this method you can include the HTML inside of the PHP tags. This is a nice quick method if you only have a line or so to do. Here is an example:
< ?php
Echo "“;
Echo ““;
Echo “My Example“;
//your php code here
Print “Print works too!“;
?>
Using one or both of these methods you can easily embed HTML code in your PHP pages, to give them a nicer more formatted look, and make them more user friendly.Good Luck!
Sean Colicchio
Server Engineer
Host My Site
http://www.hostmysite.com/?utm_source=bb
about 1 year ago
/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
var sixteen;
var one;
var red;
var green;
var blue;
var colorCode;
var inputType = “dec”;
var ralpha = “0123456789ABCDEF”;
var temppos;
var rnumber;
hexArray = new Array();
hexArray[0] = “0″;
hexArray[1] = “1″;
hexArray[2] = “2″;
hexArray[3] = “3″;
hexArray[4] = “4″;
hexArray[5] = “5″;
hexArray[6] = “6″;
hexArray[7] = “7″;
hexArray[8] = “8″;
hexArray[9] = “9″;
hexArray[10] = “A”;
hexArray[11] = “B”;
hexArray[12] = “C”;
hexArray[13] = “D”;
hexArray[14] = “E”;
hexArray[15] = “F”;
rhexArray = new Array();
rhexArray[0] = “F”;
rhexArray[1] = “E”;
rhexArray[2] = “D”;
rhexArray[3] = “C”;
rhexArray[4] = “B”;
rhexArray[5] = “A”;
rhexArray[6] = “9″;
rhexArray[7] = “8″;
rhexArray[8] = “7″;
rhexArray[9] = “6″;
rhexArray[10] = “5″;
rhexArray[11] = “4″;
rhexArray[12] = “3″;
rhexArray[13] = “2″;
rhexArray[14] = “1″;
rhexArray[15] = “0″;
function d2h(number) { //converts a decimal number to hexadecimal
sixteen = Math.floor(number/16); //value in the 16s position
one = Math.floor(number-(sixteen*16)); //value in the 1s position
sixteen = hexArray[sixteen]; //hex representation of the value in the 16s position
one = hexArray[one]; //hex respresentation of the value in the 1s position
number = sixteen + one; //concatenate string values of hex digits
return number;
}
function h2d(number) { //converts hexadecimal numbers to decimal equivalents
if(number.substring(0,1) == “F”) {
sixteen = 15;
} else if(number.substring(0,1) == “E”) {
sixteen = 14;
} else if(number.substring(0,1) == “D”) {
sixteen = 13;
} else if(number.substring(0,1) == “C”) {
sixteen = 12;
} else if(number.substring(0,1) == “B”) {
sixteen = 11;
} else if(number.substring(0,1) == “A”) {
sixteen = 10;
} else {
sixteen = eval(number.substring(0,1));
}
sixteen = sixteen * 16;
if(number.substring(1,2) == “F”) {
one = 15;
} else if(number.substring(1,2) == “E”) {
one = 14;
} else if(number.substring(1,2) == “D”) {
one = 13;
} else if(number.substring(1,2) == “C”) {
one = 12;
} else if(number.substring(1,2) == “B”) {
one = 11
} else if(number.substring(1,2) == “A”) {
one = 10;
} else {
one = eval(number.substring(1,2));
}
return sixteen + one; //return sum of these decimal numbers
}
function changeFgColor(number) { //this function receives the background’s hexadecimal color code
//as a parameter, and then returns a suitable font color that would
//be visible on that background color
rnumber = “”;
for(i=0; i < = number.length-1; i++) {
temppos = ralpha.indexOf(number.charAt(i));
rnumber = rnumber + rhexArray[temppos];
}
return rnumber;
}
function changeBgColor() { //this function reads in values from the text fields, parses the text
//as a color code, and then changes the background color
if(inputType == "hex") { //if user has changed the hexadecimal field
document.colorform.hextext.value = document.colorform.hextext.value.toUpperCase();
if(document.colorform.hextext.value.substring(0,1) == "#") { //if user placed "#" in front of hex color code
colorCode = document.colorform.hextext.value.substring(1,7);
} else {
colorCode = document.colorform.hextext.value.substring(0,6);
}
document.colorform.redtext.value = h2d(colorCode.substring(0,2)); //converts to red's decimal value
document.colorform.greentext.value = h2d(colorCode.substring(2,4)); //converts to red's decimal value
document.colorform.bluetext.value = h2d(colorCode.substring(4,6)); //converts to red's decimal value
document.bgColor = colorCode; //change background color
document.fgColor = changeFgColor(colorCode); //change font color to something readable
return false; //exit function
}
//if program reaches this point, the color code is to be based on inputted decimal values,
//as opposed to hexadecimal values
//check red's value range
if (eval(document.colorform.redtext.value) > 255 || eval(document.colorform.redtext.value) < 0) {
alert("All values must be and less than or equal to 255 and greater than or equal to 0.");
return false;
}
//check green's value range
if (eval(document.colorform.greentext.value) > 255 || eval(document.colorform.greentext.value) < 0) {
alert("All values must be and less than or equal to 255 and greater than or equal to 0.");
return false;
}
//check blue's value range
if (eval(document.colorform.bluetext.value) > 255 || eval(document.colorform.bluetext.value) < 0) {
alert("All values must be and less than or equal to 255 and greater than or equal to 0.");
return false;
}
red = d2h(eval(document.colorform.redtext.value)); //convert red's decimal value to hex
green = d2h(eval(document.colorform.greentext.value));//convert green's decimal value to hex
blue = d2h(eval(document.colorform.bluetext.value)); //convert blue's decimal value to hex
colorCode = red + green + blue; //create hexadecimal color code
document.bgColor = colorCode; //set background color
document.fgColor = changeFgColor(colorCode); //change font color to something readable
document.colorform.hextext.value = "#" + colorCode; //rewrite hex's text field with new color code
}
function changeInput(type) {
inputType = type; //inputType is to determine whether the user is changing the decimal text fields,
//or the hexadecimal text fields
}
function instruct() { //alerts user with instructions
alert("Enter a Red, Green, or Blue value of 0 to 255 nor enter a 6 digit Hex Color Code using numbers 0-9nand letters A-F then click Change Background.");
}
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