browser=navigator.appName;
browserNum=parseInt(navigator.appVersion);

if ((browser=="Netscape")&&(browserNum<5))
{
	//Netscape 4.x
	layerRef="document.layers['";
	endLayerRef="']";
	styleRef="";
}
else if ((browser=="Netscape")&&(browserNum>=5) || (browser=="Opera"))
{
	//Netscape 6
	layerRef="document.getElementById('";
	styleRef=".style";
	endLayerRef="')";
}
else
{
	//Internet Explorer
	layerRef="document.all['";
	endLayerRef="']";
	styleRef=".style";
}

// Index Home page 
function rollback(dir)
{
	if(document.about)
	{
	   document.about.src = dir+'images/common/menu/about_us_b.gif';
	}
	
	if(document.cover_story)
	{
	   document.cover_story.src = dir+'images/common/menu/cover_story_b.gif';
	}
	
	if(document.news)
	{
	   document.news.src = dir+'images/common/menu/news_b.gif';
	}
	
	if(document.project)
	{
	   document.project.src = dir+'images/common/menu/project_report_b.gif';
	}
	
	if(document.resources)
	{
	   document.resources.src = dir+'images/common/menu/resources_b.gif';
	}
	
	if(document.happening)
	{
	   document.happening.src = dir+'images/common/menu/happening_b.gif';
	}
	
	if(document.home)
	{
	   document.home.src = dir+'images/common/menu/home_b.gif';
	}
}

function preloadImages()
{
    if (document.images)
    {
        aboutperc_r = newImage("images/common/menu/about_b_r.gif");
        project_r = newImage("images/common/menu/project_b_r.gif");
        home_r = newImage("images/common/menu/home_b_r.gif");
    }
}

function changeImages() {
	if (document.images) {
		for (var i=0; i<changeImages.arguments.length;i+=2) {
			document[changeImages.arguments[i]].src=changeImages.arguments[i+1];
		}
	}
}

function emailOpen(page) {
	window.open(page,'475x475','toolbar=no,status=no,scrollbars=yes,location=no,menubar=no,directories=yes,width=420,height=400')
}