//function to determine height of nav depending on page name
function getSNTop (pageName) {

	var pageNames = new Array('intro','people','client','portfolio','case_studies','interactive','brand','literature','moving','contact','client_login');
	var navHeights = new Array('x',172,172,110,110,110,110,110,110,110,172,172);
	
	for (var i=0;i<pageNames.length;i++) if (pageNames[i] == pageName) return navHeights[(i+1)]

}

//initialisation function for section navigation
function initSectionNav (pageName) {
	
	//set section nav bar to height and width
	var navTop = getSNTop(pageName);	//calculate height of nav bar
	var pageMinWidth = 780;
	var navWidth = (window_width > pageMinWidth) ? (window_width - 35) : (pageMinWidth - 35);
	
	if(document.layers) {
		document.layers.lyrSectionNav.top = navTop;
		document.layers.lyrSectionNav.width = navWidth;
		//if header bar then set its width and turn it on
		if(document.layers.lyrHeaderBar) {
			//if image to be tiled then tile it
			if(header_image[0] == 'bg') {
				document.layers.lyrHeaderBar.document.open();
				document.layers.lyrHeaderBar.document.writeln('<table cellspacing="0" cellpadding="0" border="0" width="' + (navWidth + 20) + '"><tr><td bgcolor="' + header_image[4] + '"><img src="../Futura%20Interactive%20-%20Case%20Studies_file/%27%20%2B%20header_image%5B1%5D%20%2B%20%27" alt="" width="'+ header_image[3] +'" height="' + header_image[2] + '" border="0"></td></tr></table>');
				document.layers.lyrHeaderBar.document.close();
			}
			else if(header_image[0] == 'tile') {
				document.layers.lyrHeaderBar.document.open();
				document.layers.lyrHeaderBar.document.writeln('<table cellspacing="0" cellpadding="0" border="0"><tr><td background="../Futura%20Interactive%20-%20Case%20Studies_file/%27%20%2B%20header_image%5B1%5D%20%2B%20%27"><img src="../images/blank.gif" alt="" width="'+ (navWidth + 20) +'" height="' + header_image[2] + '" border="0"></td></tr></table>');
				document.layers.lyrHeaderBar.document.close();
			}
			document.layers.lyrHeaderBar.width = navWidth;
			window.setTimeout('document.layers.lyrHeaderBar.visibility = "show"',100);
		}
		window.setTimeout('document.layers.lyrSectionNav.visibility = "show"',100);
	}
	else if(document.all) {
		document.all.lyrSectionNav.style.top = navTop;
		document.all.lyrSectionNav.style.width = navWidth;
		//if header bar then set its width and turn it on
		if (document.all.lyrHeaderBar) {
			document.all.lyrHeaderBar.style.width = navWidth;
			window.setTimeout('document.all.lyrHeaderBar.style.visibility = "visible"',100);
		}
		window.setTimeout('document.all.lyrSectionNav.style.visibility = "visible"',100);
	}
	else if(document.getElementById) {
		document.getElementById('lyrSectionNav').style.top = navTop;
		document.getElementById('lyrSectionNav').style.width = navWidth;
		//if header bar then set its width and turn it on
		if (document.getElementById('lyrHeaderBar')) {
			document.getElementById('lyrHeaderBar').style.width = navWidth;
			window.setTimeout('document.getElementById("lyrHeaderBar").style.visibility = "visible"',100);
		}
		window.setTimeout('document.getElementById("lyrSectionNav").style.visibility = "visible"',100);
	}
	
}