That depends. If you just put some javascript code somewhere (like document.write('hello')) it will be executed on page load. However, you'll mostly want to use functions; you then call those functions on certain events (like a button onclick) to execute their code.
A JavaScript tutorial contains instructions that will teach you how to code in JavaScript.
In JavaScript we have the following conditional statements:if statement - you would use this statement to execute some code only if a specified condition is trueif...else statement - you would use this statement to execute some code if the condition is true and another code if the condition is falseif...else if....else statement - you would use this statement to select one of many blocks of code to be executedswitch statement - you would use this statement to select one of many blocks of code to be executedFor example: If StatementUse the if statement to execute some code only if a specified condition is true. Syntaxif (condition) {code to be executed if condition is true}If...else StatementUse the if....else statement to execute some code if a condition is true and another code if the condition is not true. Syntaxif (condition) {code to be executed if condition is true}If...else if...else StatementUse the if....else if...else statement to select one of several blocks of code to be executed. Syntaxif (condition1) {code to be executed if condition1 is true}else if (condition2){code to be executed if condition2 is true}else{code to be executed if condition1 and condition2 are not true}else{code to be executed if condition is not true}
jQuery is like an advanced JavaScript code. jQuery is a JavaScript code library that gives you more features with less code that what Javascript would require. If you understand JavaScript, jQuery wouldn't be much of a change.
PHP is server-side code which means that the code is executed on the web server. The pages are dynamically created and sent to the user's browser. JavaScript is a client-side code which means that it runs on the user's computer after the page has been sent from the server. It is possible to combine PHP commands within JavaScript commands. You would mainly use this in setting up starting variables for your JavaScript. Example: ; …etc --> Another option is that you may consider using Ajax which allows you to dynamically call server-side code from JavaScript.
Start the document with: <%@ language="javascript" %>
As far as web programming is concerned, client side programming is code that runs in the web browser, rather than the web server. JavaScript is an example of client side scripting because the code is sent to the browser, at which point it is executed. PHP is an example of server side scripting because the code is executed on the server, and the resulting code is sent to the browser and displayed.
we can do this using of javascript. you can use this following code: <input type=button value="button" onClick=onclick_function()> here onclick_function() is a function which is called by javascript on clicking the button. javascript code is as follows: <script language="javascript" type="text/javascript"> // your code for onclick_function() function onclick_function(){ alert("Welcome to javascript"); } </script>
Use confirm or alert in javascript code to get a popup
javascript: document.body.contentEditable = 'true'; document.designMode = 'on'; void 0
JavaScript code looks like this:function sayhi(name) {alert("Hey there, "+name);}sayhi("joe");
This is the machine code program file that can be loaded and executed by the computer. It will make the computer do whatever the program was designed to do, if it was written correctly.
If there is no actual error in the code itself, most likely javascript is disabled in the browser.