// Function to search an array for specified value
function search_array(array, value) {
	return_value = -1;
	for (a=0; a<array.length; a++) {
		if (array[a]==value) {
			return_value = a;
		}
	}
	return return_value;
}

// Function to swap image
function swap_image(img_name,direction) {
	switch(direction) {
		case "out":
			if (page!=img_name) {
				new_image = "images/" + img_name + ".gif";
				document[img_name].src = new_image;
			}
		break;
		case "over":
			new_image = "images/" + img_name + "_active.gif";
			document[img_name].src = new_image;	
		break;
	}
}

// Get page name from URL
pages_array = Array("about","services","products","clients","news","awards","investors","careers","contact");
var current_url = location.href;
var last_slash_index = current_url.lastIndexOf("/");
var shtml_index = current_url.indexOf(".shtml");
var page = current_url.substring((last_slash_index+1), shtml_index);
found = search_array(pages_array, page);
if (found!=-1) {
	// Page found
	img_name = pages_array[found];
	over_src = "images/"+img_name+"_active.gif";
	document[img_name].src = over_src;
} else {
	// Check for sub page
	for (a=0; a<pages_array.length; a++) {
		current_page = pages_array[a];
		page_index = page.indexOf(current_page);
		if (page_index!=-1) {
			found = search_array(pages_array, current_page);
			img_name = pages_array[found];
			over_src = "images/"+img_name+"_active.gif";
			document[img_name].src = over_src;	
		}
	}
}