function myhover(myimage) {
	var theImage = new Image();
	theImage.src = "images/"+myimage+".jpg";
	document.getElementById('preview').innerHTML = "<img src='"+theImage.src+"' alt='preview image' />";
} 

function myout() {
	document.getElementById('preview').innerHTML = "<img src='pics/blog.jpg' alt='Blog' />";	
}