///////////////////////////// VARIABLES FROM nav_config.php 
var num_navs = 7;
var num_subs= new Array("0","3","5","3","0","0","0");
var script_execution_speed = 20;
var element_move_speed_in = 3;
var element_fade_in_ie = 10;
var element_fade_in_ff = 0.1;

var element_move_speed_out = 2;
var element_fade_out_ie = 10;
var element_fade_out_ff = 0.1;

var destination_position = 20;
var origin_position = 0;
///////////////////////////// END VARIABLES FROM nav_config.php
/////// SCRIPT VARIABLES
var active_nav = -1;
var nav_element;
/////// END SCRIPT VARIABLES

if (document.getElementById && document.getElementsByTagName) {
	if (window.addEventListener) window.addEventListener('load', initiate_navigation, false);
	else if (window.attachEvent) window.attachEvent('onload', initiate_navigation);
}

function initiate_navigation(){
	var nav_element = document.getElementById("navigation_shell_holding_table");
	clearInterval(nav_element.loop);
	nav_element.loop = setInterval("navRun()", script_execution_speed);
}

function navRun(){
	for(var j = 0; j < num_navs; j++){
		var div = document.getElementById('sub_nav_'+j);
		if(j == active_nav){
			//// display
			div.style.display = 'block';
			for(var k = 0; k<num_subs[j]; k++){
				setTimeout("display_sn("+j+","+k+")", 100*k);
			}
		}else{
			//// hide em
			for(var k = 0; k<num_subs[j]; k++){
				setTimeout("hide_sn("+j+","+k+")", 100*k);
			}
		}
	}
	//// Loop through and make things none that should be
	for(var j = 0; j < num_navs; j++){
		var div = document.getElementById('sub_nav_'+j);
		var hide_this_div = 1;
		if(j != active_nav){
			if(div.style.display != 'none'){
				for(var k = 0; k<num_subs[j]; k++){
					var this_link = document.getElementById('link'+j+'_'+k);

					if(isIE()){
						if(this_link.filters.alpha.opacity > 0)
							hide_this_div = 0;
					}else{
						if(this_link.style.opacity*1 > 0)
							hide_this_div = 0;
					}
					var left_pos = this_link.style.left.slice(0,-2)*1;
					if(left_pos > origin_position)
						hide_this_div = 0;
					
					if(hide_this_div == 0)
						break;
				}
				if(hide_this_div == 1){
					div.style.display = 'none';
				}
			}
		}
	}
	if(active_nav == -1){
		if(all_nav_is_hidden()){
			var nav_element = document.getElementById("navigation_shell_holding_table");
			clearInterval(nav_element.loop);
		}
	}
}

function all_nav_is_hidden(){
	for(var j = 0; j < num_navs; j++){
		var div = document.getElementById('sub_nav_'+j);
		if(div.style.display == 'block'){
			return false;
		}
	}
	return true;
}

function display_sn(v1,v2){
	var this_link = document.getElementById('link'+v1+'_'+v2);

	if(isIE()){
		if(this_link.filters.alpha.opacity < 100)
			this_link.filters.alpha.opacity = this_link.filters.alpha.opacity + element_fade_in_ie;
	}else{
		if(this_link.style.opacity*1 < 1)
			this_link.style.opacity = this_link.style.opacity*1 + element_fade_in_ff;
	}
	var left_pos = this_link.style.left.slice(0,-2)*1;
	if(left_pos < destination_position)
		this_link.style.left = left_pos + element_move_speed_in;
	
	if(left_pos > destination_position)
		this_link.style.left = destination_position;
}

function hide_sn(v1,v2){
	var this_link = document.getElementById('link'+v1+'_'+v2);

	if(isIE()){
		if(this_link.filters.alpha.opacity > 0)
			this_link.filters.alpha.opacity = this_link.filters.alpha.opacity - element_fade_out_ie;
	}else{
		if(this_link.style.opacity*1 > 0)
			this_link.style.opacity = this_link.style.opacity*1 - element_fade_out_ff;
	}
	var left_pos = this_link.style.left.slice(0,-2)*1;
	if(left_pos > origin_position)
		this_link.style.left = left_pos - element_move_speed_out;
}

function isIE(){
	return /msie/i.test(navigator.userAgent) && !/opera/i.test(navigator.userAgent);
}