window.onload=function()
{
	nsidcLinkStyles();
	polarStereoLinkStyles();
	// add other functions to be called onload below
	
	writeCaption();
	window.setTimeout('cycle();',4000);
	(loadbanners());
	
}

function polarStereoLinkStyles()
{
	var url = document.location.href;
	
// conditions for Polar Stereo navigation 

//  Overview
	
	if(url.match(/\/polar_stereo\/index.html/))
	{
		document.getElementById("navPolarStereoOverview").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoOverview').innerHTML = 'Overview';
	}
	

// Data Summaries
	
	if(url.match(/data_summaries.html/))
	{
		document.getElementById("navPolarStereoDataSummaries").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoDataSummaries').innerHTML = 'Data Summaries';	
	}

// Documentation
	
	if(url.match(/ps_grids.html/))
	{
		document.getElementById("navPolarStereoDocumentation").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoDocumentation').innerHTML = 'Documentation';	
	}


// Tools
	
	if(url.match(/tools.html/))
	{
		document.getElementById("navPolarStereoTools").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoTools').innerHTML = 'Tools';	
	}
	
	if(url.match(/tools_data_extract.html/))
	{
		document.getElementById("navPolarStereoTools").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoTools').innerHTML = 'Tools';	
	}	

	if(url.match(/tools_data_display.html/))
	{
		document.getElementById("navPolarStereoTools").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoTools').innerHTML = 'Tools';	
	}

	if(url.match(/tools_geo_pixel.html/))
	{
		document.getElementById("navPolarStereoTools").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoTools').innerHTML = 'Tools';	
	}	
	
	if(url.match(/tools_masks.html/))
	{
		document.getElementById("navPolarStereoTools").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoTools').innerHTML = 'Tools';	
	}	
	
	
// News
	
	if(url.match(/news.html/))
	{
		document.getElementById("navPolarStereoNews").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoNews').innerHTML = 'News';	
	}
	
// Published Research
	
	if(url.match(/research.html/))
	{
		document.getElementById("navPolarStereoResearch").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoResearch').innerHTML = 'Published Research';	
	}
	
// FAQ
	
	if(url.match(/faq.html/))
	{
		document.getElementById("navPolarStereoFaq").className = "secondarySiteNavActiveNoSubnav";
		document.getElementById('navPolarStereoFaq').innerHTML = 'FAQ';	
	}
	


	else {}
			

}