/********* doOnLoad ************/
function doOnLoad() {


	// load hover images
	loadRolloverImages();


	// preload images

}

/********* preloadImage - preload an image ************/
function loadRolloverImages() {

	var allimgs = document.getElementsByTagName('img');
	for(var i=0; i<allimgs.length; ++i) {
		if(allimgs[i].getAttribute('hoversrc')) {
			_loadRolloverImage(allimgs[i]);
		}
	}

	var allinputs = document.getElementsByTagName('input');
	for(var i=0; i<allinputs.length; ++i) {
		if(allinputs[i].getAttribute('hoversrc')) {
			_loadRolloverImage(allinputs[i]);
		}
	}

}

function _loadRolloverImage(img) {
	preloadImage(img.getAttribute('hoversrc'));

	img.onmouseover = function() {
		var src = this.getAttribute('src');
		if(src) {
			this.setAttribute('__src_orig', src);
			this.setAttribute('__filter_orig', this.style.filter);

			if(this.style.filter && navigator.userAgent.toUpperCase().indexOf('MSIE') >= 0) {
				this.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+this.getAttribute('hoversrc')+"', sizingMethod='scale')";
			} else {
				this.setAttribute('src', this.getAttribute('hoversrc'));
			}
		}
	};
	img.onmouseout = function() {
		var src = this.getAttribute('__src_orig');
		if(src) {
			if(this.style.filter && navigator.userAgent.toUpperCase().indexOf('MSIE') >= 0) {
				this.style.filter = this.getAttribute('__filter_orig');
			} else {
				this.setAttribute('src', src);
			}
		}
	};

}

function preloadImage(href) {
	if(!window.preloadImageList) window.preloadImageList = new Array();
	var i = window.preloadImageList.length;

	window.preloadImageList[i] = new Image();
	window.preloadImageList[i].src = href;
}

function popupWin(that, w, h, options) {
	if(!w) w = 500;
	if(!h) h = 500;

	var x = (screen.availWidth - w) / 2;
	var y = (screen.availHeight - h) / 2;

	if(!options) options = '';

	var optslist = new Array();
	optslist[optslist.length] = 'width='+w;
	optslist[optslist.length] = 'height='+h;
	optslist[optslist.length] = 'scrollbars=auto';
	optslist[optslist.length] = 'resizable=yes';
	optslist[optslist.length] = 'left='+x;
	optslist[optslist.length] = 'top='+y;

	var bits = options.split(/,/);
	for(var i=0; i<bits.length; ++i) {
		var b = bits[i].split(/=/);
		optslist[optslist.length] = b[0] + '=' + b[1];
	}
	var optionstring = optslist.join(',');



	var href;
	if(that.href) href = that.href;
	else href = that;

	var win = window.open(that.href, 'popwin', optionstring);

	win.resizeTo(w, h);
	win.focus();

	return false;
}

function getLeft(obj) {
	return (obj.offsetParent==null ? obj.offsetLeft : obj.offsetLeft + getLeft(obj.offsetParent));
}
function getTop(obj) {
	return (obj.offsetParent==null ? obj.offsetTop : obj.offsetTop + getTop(obj.offsetParent));
}


// error class
function Errors() {
	this.errors = new Array();

	this.add = function(msg) {
		this.errors[this.errors.length] = msg;
	}
	this.alert = function() {
		if(!this.errors.length) return false;

		var msg = 'The following error(s) have occurred:\n\n';

		for(var i=0; i<this.errors.length; ++i) {
			msg += '*  ' + this.errors[i];
			if(i < this.errors.length - 1) msg += '\n\n';
		}

		alert(msg);
		return true;
	}
}

function validate_email(email) {
	if(email.length <= 5) return false;
	if(email.indexOf('@', 0) == -1) return false;
	return true;
}




function validate_optin() {
	var e = new Errors();

	errfound = false;
	if (!validate_email(document.optin.email.value))
		e.add("Sorry, Invalid Email Address!");

	if(e.alert()) return false;
	return true;
}