Want to get image swapping script working in NN4

3D_Dog_Man · 07-13-2004, 09:14 AM

Hi Everyone,

I have a script that alternately swaps two images on mouse click, to give the appearance of a button being pressed. The script works fine in IE6, NS7, Firefox, now I want to code it so that it will additionally work in NN4. I have no idea of what commands to use in order to make it work in NN4, any help will be really appreciated. Also if you can see any potential problems with the scripting for IE4 could you please point them out. The script is as follows....

Code:

<html>
<head>
<title> Press Button Emulation Experiment </title>
<style type="text/css">
#nav_button_layer
{
	position:			absolute;
}
</style>
<script src="positioner.js" type="text/javascript"></script>
<script type="text/javascript">
//<!--

var buttonPressed = false;

function swapImage(imageName)
{
	if(document.getElementById)	// IE5+ & NS6+ --> W3C DOM
	{	
		var imageObject = document.getElementById(imageName);
		
		if(!buttonPressed)
		{
			imageObject.setAttribute("src", "button_1.gif");
			buttonPressed = true;
		}
		else
		if(buttonPressed)
		{
			imageObject.setAttribute("src", "button_2.gif");
			buttonPressed = false;
		}
	}
	else
	if(document.all)			// IE 4
	{
		var imageObject = document.all.item(imageName);

		if(!buttonPressed)
		{
			imageObject.src = "button_1.gif";
			buttonPressed = true;
		}
		else
		if(buttonPressed)
		{
			imageObject.src = "button_2.gif";
			buttonPressed = false;
		}
	}		
	else
	if(document.layers)
	{
		var imageObject = document.layers[imageObject];

		// Need to work out code for this section
	}
}

//-->
</script>
</head>
<body>
<div id="nav_button_layer">
	<img id="nav_button" style="cursor:pointer; cursor:hand" src="button_2.gif" onclick="swapImage('nav_button')">
</div>
	<script type="text/javascript">
		setElement('nav_button_layer', 0, 92, 8, 20, 1, "#ffffff");
	</script>	
</body>
</html>

Thanks heaps for your help with this.

Regards

Davo

glenngv · 07-13-2004, 12:21 PM

You don't need to write different codes for different browsers if it can be done with a common code that is supported by all.

Code:

function swap(imgName, imgURL){
  document.images[imgName].src = imgURL;
}
...
<a href="#" onmousedown="swap('myimage','button1_down.gif')" onmouseup="swap('myimage','button1_up.gif')"><img name="myimage" src="button1_up.gif" border="0" /></a>
<a href="#" onmousedown="swap('myimage2','button2_down.gif')" onmouseup="swap('myimage2','button2_up.gif')"><img name="myimage2" src="button2_up.gif" border="0" /></a>