function activate(item){
	document.getElementById('menu_content'+item).style.display = 'block';
	resetImages();
	document.getElementById('img'+item).src="images/buttons/"+getImageName(item)+"-light.gif";
}
function getImageName(item){
	switch (item){
	case '1': return 'home'; break;
	case '2': return 'technology'; break;
	case '3': return 'download'; break;
	case '4': return 'products'; break;
	case '5': return 'services'; break;
	case '6': return 'applications'; break;
	case '7': return 'references'; break;
	case '8': return 'aboutus'; break;
	case '9': return 'contact'; break;
	}
}
function resetImages(){
	document.getElementById('img1').src="images/buttons/home.gif";
	document.getElementById('img2').src="images/buttons/technology.gif";
	document.getElementById('img3').src="images/buttons/download.gif";
	document.getElementById('img4').src="images/buttons/products.gif";
	document.getElementById('img5').src="images/buttons/services.gif";
	document.getElementById('img6').src="images/buttons/applications.gif";
	document.getElementById('img7').src="images/buttons/references.gif";
	document.getElementById('img8').src="images/buttons/aboutus.gif";
	document.getElementById('img9').src="images/buttons/contact.gif";
}
function preload(){
	var image1=new Image();
	image1.src="images/buttons/home-light.gif";
	var image2=new Image();
	image2.src="images/buttons/technology-light.gif";
	var image3=new Image();
	image3.src="images/buttons/download-light.gif";
	var image4=new Image();
	image4.src="images/buttons/products-light.gif";
	var image5=new Image();
	image5.src="images/buttons/services-light.gif";
	var image6=new Image();
	image6.src="images/buttons/applications-light.gif";
	var image7=new Image();
	image7.src="images/buttons/references-light.gif";
	var image8=new Image();
	image8.src="images/buttons/aboutus-light.gif";
	var image9=new Image();
	image9.src="images/buttons/contact-light.gif";
}