We can control a layer by connecting it to buttons. We can display or hide the layer by clicking the buttons. To create and manage a layer we will use div tags.
We will use one on page style sheet for our div tag by defining its layout properties. We will keep this style definition inside our head tags. For more details on Style property visit our CSS section.
We will use one JavaScript function to manage the property of the div tag identified by its id.
Demo of show Hide layer→
Here is the code
In the above code we can use image as button to show and hide layers. This part is included in the above demo. Here is the code to add image in place of button.
Using one single button to show or hide the message layer
The above code will display two buttons one of showing the layer and other for hiding the layer. We can combine the functionality of these two buttons to one and keep one button which can be toggled to show or hide layer. The caption displayed over the button can be changed by using value property of the button id. We will change this data also and display the appropriate label to give the message.
<html>
<head>
<title>Demo of Show hide div layer onclick of buttons</title>
<META NAME="DESCRIPTION" CONTENT="Demo for showing and hiding div">
<META NAME="KEYWORDS" CONTENT="Demo Show layer, div style set">
<style type="text/css">
div {
position: absolute;
left: 250px;
top: 200px;
background-color: #f1f1f1;
width: 280px;
padding: 10px;
color: black;
border: #0000cc 2px dashed;
display: none;
}
</style>
<script language="JavaScript">
function setVisibility(id) {
if(document.getElementById('bt1').value=='Hide Layer'){
document.getElementById('bt1').value = 'Show Layer';
document.getElementById(id).style.display = 'none';
}else{
document.getElementById('bt1').value = 'Hide Layer';
document.getElementById(id).style.display = 'inline';
}
}
</script>
</head>
<body>
<input type=button name=type id='bt1' value='Show Layer'
onclick="setVisibility('sub3');";>
<div id="sub3">Message Box</div>
<br><br>
</body>
</html>
Using single button and more than one layer ( boxes )
To manage more than one layer we can use the same function and pass two ids of the message layer to the function. Inside the function in place of managing one layer we will mange two layers.
Inside the style declaration we will be using relative positioning as we will be displaying two layers. Demo of managing two boxes by single button→
The code is here
Two layers showing one at a time with button click
Instead of using common style for div layers , we will keep individual style property of the layers so it can be managed easily. Here we will keep one layer hidden and one visible at the time of page loading.
Then Inside the if condition we will change the status of the layers and make one visible and one hidden. So on each click one layer will be visible at a time.