/* 
    javascript : home.js
    Created on : 08/03/2011, 12:15:13 AM
    Author     : Simon Assouline
    Copyright  : © 2011 IT BUFF - Newcastle
    Description: Scripts for home page
*/

/* Left navigation - show hide content */

preload_image_object = new Image();
// set image url
image_url = new Array();
image_url[0] = "http://www.itbuff.com.au/images/home/content_link1.png";
image_url[1] = "http://www.itbuff.com.au/images/home/content_link1_a.png";
image_url[2] = "http://www.itbuff.com.au/images/home/content_link1_h.png";
image_url[3] = "http://www.itbuff.com.au/images/home/content_link2.png";
image_url[4] = "http://www.itbuff.com.au/images/home/content_link2_a.png";
image_url[5] = "http://www.itbuff.com.au/images/home/content_link2_h.png";
image_url[6] = "http://www.itbuff.com.au/images/home/content_link3.png";
image_url[7] = "http://www.itbuff.com.au/images/home/content_link3_a.png";
image_url[8] = "http://www.itbuff.com.au/images/home/content_link3_h.png";
image_url[9] = "http://www.itbuff.com.au/images/home/content_link4.png";
image_url[10] = "http://www.itbuff.com.au/images/home/content_link4_a.png";
image_url[11] = "http://www.itbuff.com.au/images/home/content_link4_h.png";

var i = 0;
for(i=0; i<=11; i++) 
preload_image_object.src = image_url[i];



function setVisibility(nav_id, visibility)
{
  document.getElementById('ContentFrame01').style.visibility = 'hidden';
	document.getElementById('ContentFrame02').style.visibility = 'hidden';
	document.getElementById('ContentFrame03').style.visibility = 'hidden';
	document.getElementById('ContentFrame04').style.visibility = 'hidden';
	document.getElementById(nav_id).style.visibility = visibility;

	document.getElementById("leftnav01").className = "leftnav01";
	document.getElementById("leftnav02").className = "leftnav02";
	document.getElementById("leftnav03").className = "leftnav03";
	document.getElementById("leftnav04").className = "leftnav04";

	switch(nav_id)
	{
		case 'ContentFrame01':
  			document.getElementById("leftnav01").className = "leftnav01_a";
    break;
		case 'ContentFrame02':
  			document.getElementById("leftnav02").className = "leftnav02_a";
  	break;
		case 'ContentFrame03':
  			document.getElementById("leftnav03").className = "leftnav03_a";
  	break;
		case 'ContentFrame04':
  			document.getElementById("leftnav04").className = "leftnav04_a";
  	break;
		default:
  		document.getElementById("leftnav02").className = "leftnav02_a";
	}
	
}


function LeftNavHover (navid) {

if (document.getElementById("leftnav01").className != "leftnav01_a" && navid=='leftnav01') 
	{ document.getElementById("leftnav01").className = "leftnav01_h"; }

if (document.getElementById("leftnav02").className != "leftnav02_a" && navid=='leftnav02') 
	{ document.getElementById("leftnav02").className = "leftnav02_h"; }

if (document.getElementById("leftnav03").className != "leftnav03_a" && navid=='leftnav03') 
	{ document.getElementById("leftnav03").className = "leftnav03_h"; }

if (document.getElementById("leftnav04").className != "leftnav04_a" && navid=='leftnav04') 
	{ document.getElementById("leftnav04").className = "leftnav04_h"; }
}

function LeftNavOut (navid) {

if (document.getElementById("leftnav01").className != "leftnav01_a" && navid=='leftnav01') 
	{ document.getElementById("leftnav01").className = "leftnav01"; }

if (document.getElementById("leftnav02").className != "leftnav02_a" && navid=='leftnav02') 
	{ document.getElementById("leftnav02").className = "leftnav02"; }

if (document.getElementById("leftnav03").className != "leftnav03_a" && navid=='leftnav03') 
	{ document.getElementById("leftnav03").className = "leftnav03"; }

if (document.getElementById("leftnav04").className != "leftnav04_a" && navid=='leftnav04') 
	{ document.getElementById("leftnav04").className = "leftnav04"; }
}