// -- images to preload
var preloaded_images = Array (
	'btn_find-on.gif',
	'nav_events-on.png',
	'nav_testimonials-on.png',
	'nav_tour-on.png',
	'nav_what-is-on.png'
);

//document.body.onload = doPreload();

// -- force preloading
function doPreload() {
	for (i=0; i<preloaded_images.length; i++) {
		var img = new Image();
		img.src = 'img/' + preloaded_images[i];
	}
}

doPreload();

// -- handles changing image src
function swapImage (id, src) {
	if (document.getElementById) {
		var img = document.getElementById(id);
		img.src = src;
	}
	return false;
}

function swapText (str) {
	if (document.getElementById) {
		var txt = document.getElementById("content");
		txt.innerHTML = str;
	}
	return false;
}

function checkZip () {
	var f = document.event_search_form;
	var ff = document.getElementById('zipcode');
	var ffv = ff.value;
	if (ffv != 'ENTER ZIPCODE' && ffv != '' && ffv.length > 4) {
		ff.blur();
		f.method = "GET";
		f.action = "events.html";
		f.submit();
	} else {
		ff.className = 'search_focus';
		return false;
	}
}