function showDiv(d) {
	pages = new Array('page_info','page_content','page_nav');
	for(i=0;i<pages.length;i++) {
		link = pages[i]+"_link";
		if(d==pages[i]) {
			document.getElementById(pages[i]).style.display="block";		
			document.getElementById(link).style.backgroundColor="#336699";	
			document.getElementById(link).style.color="#ffffff";
		}	
		else {
			document.getElementById(pages[i]).style.display="none";
			document.getElementById(link).style.backgroundColor="#ffffff";	
			document.getElementById(link).style.color="#999999";
		}
	}
}
function toggleDiv(d) {
	if(document.getElementById(d).style.display=="" || document.getElementById(d).style.display=="none") {
		document.getElementById(d).style.display="block";
	}
	else {
		document.getElementById(d).style.display="none";
	}
}