The following code shows how to create an alert dialog box and change the text on your main HTML page using a javaScript junction.
/****************************************************************************/
<html>
<head>
<title>My First Java Script</title>
</head>
<body>
<button type="button" onClick="MyFunction()">Click me!</button>
<p id="demo">Hello Lavish Kothari</p>
<script>
function MyFunction()
{
alert("the Text will now be converted");
document.getElementById("demo").innerHTML="HELLO LAVISH KOTHARI";
}
</script>
</body>
</html>
/****************************************************************************/
<html>
<body>
<h1>My First JavaScript</h1>
<p id="demo">JavaScript can change the style of an HTML element.</p>
<script>
function myFunction() {
var x = document.getElementById("demo");
x.style.fontSize = "25px";
x.style.color = "red";
}
</script>
<button type="button" onclick="myFunction()">Click Me!</button>
</body>
</html>
/****************************************************************************/
similarly you can use
onclick : The event occurs when the user clicks on an element
ondblclick : The event occurs when the user double-clicks on an element
onmousedown : The event occurs when a user presses a mouse button over an element
onmousemove : The event occurs when the pointer is moving while it is over an element
onmouseover : The event occurs when the pointer is moved onto an element
onmouseout : The event occurs when a user moves the mouse pointer out of an element
onmouseup : The event occurs when a user releases a mouse button over an element
/****************************************************************************/
<html>
<head>
<title>My First Java Script</title>
</head>
<body>
<button type="button" onClick="MyFunction()">Click me!</button>
<p id="demo">Hello Lavish Kothari</p>
<script>
function MyFunction()
{
alert("the Text will now be converted");
document.getElementById("demo").innerHTML="HELLO LAVISH KOTHARI";
}
</script>
</body>
</html>
/****************************************************************************/
<html>
<body>
<h1>My First JavaScript</h1>
<p id="demo">JavaScript can change the style of an HTML element.</p>
<script>
function myFunction() {
var x = document.getElementById("demo");
x.style.fontSize = "25px";
x.style.color = "red";
}
</script>
<button type="button" onclick="myFunction()">Click Me!</button>
</body>
</html>
/****************************************************************************/
similarly you can use
onclick : The event occurs when the user clicks on an element
ondblclick : The event occurs when the user double-clicks on an element
onmousedown : The event occurs when a user presses a mouse button over an element
onmousemove : The event occurs when the pointer is moving while it is over an element
onmouseover : The event occurs when the pointer is moved onto an element
onmouseout : The event occurs when a user moves the mouse pointer out of an element
onmouseup : The event occurs when a user releases a mouse button over an element
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