// URL for BGS home
var bgsHomePath = 'http://bgs.ac.uk/';
var siteHomePath = '/';
var bannerImageFile = 'header.jpg';

// preload the images for the foot of page icons
var images = new Array(8);
images[0] = new Image();
images[0].src = "/bgscurrent/206_print_up.gif";        // highlighted print icon
images[1] = new Image();
images[1].src = "/bgscurrent/206_print_down.gif";      // white print icon
images[2] = new Image();
images[2].src = "/bgscurrent/204_back_up.gif";         // highlighted back icon
images[3] = new Image();
images[3].src = "/bgscurrent/204_back_down.gif";       // white back icon
images[4] = new Image();
images[4].src = "/bgscurrent/205_top_up.gif";          // highlighted top icon
images[5] = new Image();
images[5].src = "/bgscurrent/205_top_down.gif";        // white top icon
images[6] = new Image();
images[6].src = "/bgscurrent/207_email_up.gif";        // highlighted email icon
images[7] = new Image();
images[7].src = "/bgscurrent/207_email_down.gif";      // white email icon


function write_header () 
{

document.write("<div id='header'>");
document.write("<a href='" + bgsHomePath + "' style='float:left;'>");
document.write("<img border='0' src='/images/" + bannerImageFile +"' ");
document.write("alt='BGS Logo superimposed on photographic banner and link to the BGS homepage' ");
document.write("title='BGS Logo superimposed on photographic banner and link to the BGS homepage' />");
document.write("</a>");
document.write("<br style='clear:both' />");
document.write("</div>");

//  document.write("<table width='760' border='0' cellspacing='0' cellpadding='0' height='64'>");
//  document.write("<tr>");
//  document.write("<td width='250' height='64' background='/bgscurrent/001_bgslogo.gif' align='center' valign='middle'>");
//  document.write("<a name='pageTop'></a>");
////  document.write("<a href='#navigation'><img src='/bgscurrent/000_blank.gif' border='0' alt='Go to the BGS navigation menu' width='0' height='0' /></a>");
////  document.write("<a href='#content'><img src='/bgscurrent/000_blank.gif' border='0'  alt='Go to the main content of this page' width='0' height='0' /></a>");
//  document.write("<a href='" + bgsHomePath +"' tabindex='1'><img src='/bgscurrent/000_blank.gif' width='200' height='60' border='0' alt='To the BGS Main Site home page'></a></td>");
//  document.write("<td width='370' height='64' background='/bgscurrent/002_topfiller.gif'><img src='" + bannerImageFile +"' alt='' width='370' height='64' border='0'/></td>");
//  document.write("<td width='140' height='64' background='/bgscurrent/003_search.gif'><img src='/bgscurrent/003_search.gif' alt='' width='140' border='0'/></td>");
//  document.write("</tr>");
//  document.write("</table>");

}


function swapImage(button)
{
  if (button.src == images[1].src) button.src = images[0].src;
  if (button.src == images[3].src) button.src = images[2].src;
  if (button.src == images[5].src) button.src = images[4].src;
  if (button.src == images[7].src) button.src = images[6].src;
}
function restoreImage (button)
{
  if (button.src == images[0].src) button.src = images[1].src;
  if (button.src == images[2].src) button.src = images[3].src;
  if (button.src == images[4].src) button.src = images[5].src;
  if (button.src == images[6].src) button.src = images[7].src;
}



function write_footer () 
{

  document.write("<!-- start of footer -->");
  document.write("<br>");
  document.write("<table width='760' border='0' cellspacing='0' cellpadding='0' height='24'>");
  document.write("<tr>");
  document.write("<td width='155' background='/bgscurrent/201_footleft.gif' valign='middle' align='left' height='32'>");

  document.write("<!-- table with nav buttons -->");
  document.write("<table border='0' cellspacing='0' cellpadding='0' width='100'>");
  document.write("<tr>");
// next line to be reinstated when print function works
//  document.write("<td><a href='javascript: printPage();' onMouseOut='restoreImage(document.print);' onMouseOver='swapImage(document.print);'><img src='" + images[1].src + "' width='24' height='24' border='0' alt='Print this page' name='print'></a></td>");
  document.write("<td><a href='" + siteHomePath + "' onMouseOut='restoreImage(document.back);' onMouseOver='swapImage(document.back);'><img src='" + images[3].src + "' width='24' height='24' border='0' alt='Home page' name='back'></a></td>");
  document.write("<td><a href='#PageTop' onMouseOut='restoreImage(document.top);' onMouseOver='swapImage(document.top);'><img src='" + images[5].src + "' width='24' height='24' border='0' alt='Back to the top of this page' name='top'></a></td>");
  document.write("<td><a href='mailto:www-bgs@bgs.ac.uk' onMouseOut='restoreImage(document.email);' onMouseOver='swapImage(document.email);'><img src='" + images[7].src + "' width='24' height='24' border='0' alt='Contact the BGS webmaster' name='email'></a></td>");
  document.write("</tr>");
  document.write("</table>");

  document.write("</td>");
  document.write("<td width='450' background='/bgscurrent/202_footfiller.gif' valign='middle' align='center' class='navitem'>");

  document.write("<!-- table with blurb -->");
  document.write("<table border='0' cellspacing='0' cellpadding='0'>");
  document.write("<tr>");
  document.write("<td class='navitem' nowrap valign='bottom' align='center'>Information regarding the <a class='navitem' href='" + bgsHomePath + "about/copyright/home.html'>copyright</a> of BGS material and the BGS <a class='navitem' href='" + bgsHomePath + "about/privacy.html'>Privacy policy</a>.");
//  document.write("<a href='#navigation'><img src='/bgscurrent/000_blank.gif' border='0' alt='Go to the BGS navigation menu' width='0' height='0' /></a>");
//  document.write("<a href='#content'><img src='/bgscurrent/000_blank.gif' border='0' alt='Go to the main content of this page' width='0' height='0' /></a>");
	
  document.write("</td>");
  document.write("</tr>");
  document.write("</table>");

  document.write("</td>");
  document.write("<td width='155' background='/bgscurrent/203_footright.gif' height='32'><a href='http://www.nerc.ac.uk'><img src='/bgscurrent/000_blank.gif' width='155' height='28' border='0' alt='BGS is part of the Natural Enviromnment Research Council (NERC)'></a>");
  document.write("</td>");
  document.write("</tr>");
  document.write("</table>");
}