// rollovers.js -- Rollover objects and functions for "chapter" pages

// Make sure that images are supported in the Document Object Model

if (document.images) {

// Identify images for any number of variables (could be done using an array, as well)

	var nav_04_over = new Image();
	var nav_04_out = new Image();
	
	var nav_06_over = new Image();
	var nav_06_out = new Image();
	
	var nav_08_over = new Image();
	var nav_08_out = new Image();
	
	var nav_10_over = new Image();
	var nav_10_out = new Image();
	
	var nav_12_over = new Image();
	var nav_12_out = new Image();
	
	var nav_14_over = new Image();
	var nav_14_out = new Image();
	
	var nav_16_over = new Image();
	var nav_16_out = new Image();
	
	
	var nav_18_over = new Image();
	var nav_18_out = new Image();
	
	var nav_20_over = new Image();
	var nav_20_out = new Image();
	
	
	

	nav_04_over.src = "nav/nav_04_over.gif";
	nav_04_out.src = "nav/nav_04_out.gif";
	
	nav_06_over.src = "nav/nav_06_over.gif";
	nav_06_out.src = "nav/nav_06_out.gif";
	
	nav_08_over.src = "nav/nav_08_over.gif";
	nav_08_out.src = "nav/nav_08_out.gif";
	
	nav_10_over.src = "nav/nav_10_over.gif";
	nav_10_out.src = "nav/nav_10_out.gif";
	
	nav_12_over.src = "nav/nav_12_over.gif";
	nav_12_out.src = "nav/nav_12_out.gif";
	
	nav_14_over.src = "nav/nav_14_over.gif";
	nav_14_out.src = "nav/nav_14_out.gif";
	
	nav_16_over.src = "nav/nav_16_over.gif";
	nav_16_out.src = "nav/nav_16_out.gif";
	
	nav_18_over.src = "nav/nav_18_over.gif";
	nav_18_out.src = "nav/nav_18_out.gif";
	
	nav_20_over.src = "nav/nav_20_over.gif";
	nav_20_out.src = "nav/nav_20_out.gif";
	
	
	
	
}


// Begin image_over: Replace image named 'imagename' with 'imagename_over'

function image_over(image_name) {
	if (document.images) {
		document.images[image_name].src = eval(image_name + "_over.src");
	}
} // End image_out


// Begin image_over: Replace image named 'imagename' with 'imagename_out'

function image_out(image_name) {
	if (document.images) {
		document.images[image_name].src = eval(image_name + "_out.src");
	}
} // End image_out