// JavaScript

var suffix = '_over';
var preloadimages = new Array();
var _uacct;

window.onload = initrolloverimages;

function overmage() {
	if (this.src && this.src.indexOf('.') != -1) {
		this.src = getrolloverimagefile(this.src);
	}
}

function normalimage() {
	if (this.src && this.src.indexOf('.') != -1) {
		this.src = getoriginalimagefile(this.src);
	}
}

function getrolloverimagefile(path) {
	var filename = path.substring(0, path.lastIndexOf('.'));
	var extention = path.substring(path.lastIndexOf('.'), path.length);
	return filename + suffix + extention;
}

function getoriginalimagefile(path) {
	var filename = path.substring(0, path.lastIndexOf('.')-suffix.length);
	var extention = path.substring(path.lastIndexOf('.'), path.length);
	return filename + extention;
}

function initrolloverimages() {
	var images = document.getElementsByTagName('img');
	for (var i=0; i<images.length; i++) {
		var classValue = null;
		if (images[i].getAttribute('className'))
			classValue = images[i].getAttribute('className');
		else if (images[i].getAttribute('class'))
			classValue = images[i].getAttribute('class');
		if (classValue != null && classValue.indexOf('rollover') != -1 && images[i].src) {
			images[i].onmouseover = overmage;
			images[i].onmouseout = normalimage;
			preloadimages[i] = new Image();
			preloadimages[i].src = getrolloverimagefile(images[i].src);
		}
	}
	
	// selected menu don't change own image.
	var bodyElement = document.getElementsByTagName('body').item(0);
	if (bodyElement.className) {
		if (document.getElementById('gm'+bodyElement.className)) {			
			var menuObject = document.getElementById('gm'+bodyElement.className);
			var anchorElement = menuObject.firstChild;
			var imageElement  = anchorElement.firstChild;
			anchorElement.setAttribute('className', 'active');
			imageElement.src = getrolloverimagefile(imageElement.src);
			imageElement.onmouseover = function(){};
			imageElement.onmouseout = function(){};
		}
	}
	
}