function mainmenuover(what) {}
function mainmenuout(what) {}

function doOnLoad() {

	// preload images
	preload('assets/images/btn_global_luxury_a.gif');
	preload('assets/images/btn_about_us_a.gif');
	preload('assets/images/btn_property_search_a.gif');
	preload('assets/images/btn_property_listings_a.gif');
	preload('assets/images/btn_resources_a.gif');
	preload('assets/images/btn_home_contact_us_a.gif');
	preload('assets/images/btn_contact_us_a.gif');
}

function preload(imgsrc) {
	var i = new Image();
	i.src = imgsrc;
}


function menuOver(that) {
	var k = that.name.substr(4);
	that.src = 'assets/images/btn_'+k+'_a.gif';
}

function menuOut(that) {
	var k = that.name.substr(4);
	that.src = 'assets/images/btn_'+k+'.gif';
}



function validate_enewsletter(f) {
	var e = new Errors();
	if(!validate_email(f.email.value)) e.adderror("Sorry, Invalid Email Address!");

	return e.alert() ? false : true;
}

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

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

		var msg = '';

		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_contact(f) {
	var e = new Errors();
	if(!f.firstname.value) e.adderror("Please enter your first name.");
	if(!f.lastname.value) e.adderror("Please enter your last name.");
	if(!validate_email(f.email.value)) e.adderror("Sorry, Invalid Email Address!");

	return e.alert() ? false : true;
}