function preloadImages(){

	var btn_home=new Image(172,45);
	var btn_about=new Image(192,45);
	var btn_services=new Image(222,45);
	var btn_contact=new Image(210,45);

	var btn_home_hot=new Image(172,45);
	var btn_about_hot=new Image(192,45);
	var btn_services_hot=new Image(222,45);
	var btn_contact_hot=new Image(210,45);

	var btn_home_blur=new Image(172,45);
	var btn_about_blur=new Image(192,45);
	var btn_services_blur=new Image(222,45);
	var btn_contact_blur=new Image(210,45);	
	
	btn_home.src='../images/navigation/home.png';
	btn_about.src='../images/navigation/about.png';
	btn_services.src='../images/navigation/services.png';
	btn_contact.src='../images/navigation/contact.png';
	
	btn_home_hot.src='../images/navigation/home_hot.png';
	btn_about_hot.src='../images/navigation/about_hot.png';
	btn_services_hot.src='../images/navigation/services_hot.png';
	btn_contact_hot.src='../images/navigation/contact_hot.png';	
	
	btn_home_blur.src='../images/navigation/home_blur.png';
	btn_about_blur.src='../images/navigation/about_blur.png';
	btn_services_blur.src='../images/navigation/services_blur.png';
	btn_contact_blur.src='../images/navigation/contact_blur.png';	
}


function turnMeOn(currentBtn) {

	blurAllButtons();
	document.getElementById(currentBtn).src = '../images/navigation/'+currentBtn+'_hot.png';
	//alert(document.getElementById(currentBtn).src);
}

function blurAllButtons () {
	
	document.getElementById('home').src='../images/navigation/home_blur.png';
	document.getElementById('about').src='../images/navigation/about_blur.png';
	document.getElementById('services').src='../images/navigation/services_blur.png';
	document.getElementById('contact').src='../images/navigation/contact_blur.png';
	
	//alert(document.getElementById('about').src);
}

function restoreState(currentBtn) {

	document.getElementById('home').src='../images/navigation/home.png';
	document.getElementById('about').src='../images/navigation/about.png';
	document.getElementById('services').src='../images/navigation/services.png';
	document.getElementById('contact').src='../images/navigation/contact.png';
	
	document.getElementById(currentBtn).src = '../images/navigation/' + currentBtn + '_hot.png';

}