function on_roll_in(target) {
	var framename = "home_content";
	var buttonname = "images/frontpage_btn";
	var buttonid = "btn";
	
	var currentframename = framename + target;
	var currentbtnname = buttonname + target + "_on.jpg";
	var currentbuttonid = buttonid + target;
	
	for (var i = 1; i < 6; i ++) {
		var thisbtnid = buttonid + i;
		var thisframename = framename + i;
		if (i == target) {
			document.getElementById(thisbtnid).src = buttonname + i + "_on.jpg";
			document.getElementById(thisframename).style.display = "block";
		} else {
			document.getElementById(thisbtnid).src = buttonname + i + "_off.jpg";
			document.getElementById(thisframename).style.display = "none";
		}
	}
 
}

function nav_roll_in(target) {
	var navbuttonname = "images/navbtn" + target + "_on.gif";
	var btnid = "nav" + target;

	document.getElementById(btnid).src = navbuttonname;

}
function nav_roll_out(target) {
	var navbuttonname = "images/navbtn" + target + "_off.gif";
	var btnid = "nav" + target;

	document.getElementById(btnid).src = navbuttonname;

}

function on_roll_in2(target) {
	
	var buttonname = "images/about_btn";
	var buttonid = "aboutbtn";
	
	
	var currentbtnname = buttonname + target + "_over.jpg";
	var currentbuttonid = buttonid + target;
	
	
	document.getElementById(currentbuttonid).src = currentbtnname;
	
 
}

function on_roll_out2(target) {
	
	var buttonname = "images/about_btn";
	var buttonid = "aboutbtn";
	
	
	var currentbtnname = buttonname + target + "_off.jpg";
	var currentbuttonid = buttonid + target;
	
	
	document.getElementById(currentbuttonid).src = currentbtnname;
	
 
}