/*
	Opacity Displayer, Version 1.0
	Copyright Michael Lovitt, 6/2002.
	Distribute freely, but please leave this notice intact.

	Modifications made by Chionsas; better use the original 
	source, located at http://oaksanderson.com/opacity/opacity.js
*/


// OPACITY OBJECT
// Instantiates the object, defines the properties and methods.

function OpacityObject(divId, imgPath, imgScale) {
	this.id = divId;
	this.path = imgPath;
	this.sizingMethod = imgScale?'scale':'image';
	this.layerObject = (browser.isNSCompatible || browser.isNS || browser.isMozilla || browser.isSafari)?((browser.versionMajor>=5 || browser.isMozilla || browser.isSafari)?document.getElementById(divId).style:eval("document."+divId)):eval(divId+".style");
	this.setBackground = function() {
		// Uses AlphaImageLoader filter, or the css background property,
		// as appropriate, to apply a PNG or GIF as the background of the layerObject.
		if (pngAlpha) {
			this.layerObject.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+this.path+".png', sizingMethod='"+this.sizingMethod+"')";
		} else if (pngNormal) {
			this.layerObject.backgroundImage = 'url('+this.path+'.png)';
		} else {
			this.layerObject.backgroundImage = 'url('+this.path+'.gif)';
		}
	}
}

var pngAlpha, pngNormal = false;

// if IE5.5+ on win32, then display PNGs with AlphaImageLoader
if ((browser.isIE55 || browser.isIE6up) && browser.isWin32) {
	pngAlpha = true;
/*
	else, if the browser can display PNGs normally, then do that. that list includes:
	-Gecko Engine: Netscape 6 or Mozilla, Mac or PC
	-IE5+ Mac (OpacityObject applies the background image at 100% opacity)
	-Opera 6+ PC
	-Opera 5+ Mac (Doesn't support dynamically-set background images)
	-Opera 6+ Linux 
	-Omniweb 3.1+ 
	-Icab 1.9+ 
	-WebTV 
	-Sega Dreamcast
*/
} else if ((browser.isGecko) || (browser.isIE5up && browser.isMac) || (browser.isOpera && browser.isWin && browser.versionMajor >= 6) || (browser.isOpera && browser.isUnix && browser.versionMajor >= 6) || (browser.isOpera && browser.isMac && browser.versionMajor >= 5) || (browser.isOmniweb && browser.versionMinor >= 3.1) || (browser.isIcab && browser.versionMinor >= 1.9) || (browser.isWebtv) || (browser.isDreamcast) || (browser.isSafari)) {
	var pngNormal = true;
}