OverlayPic = new Array();
OverlayPic[0] = new Image(); 
OverlayPic[0].src = "images/ioboard_overlay.png";
OverlayPic[1] = new Image(); 
OverlayPic[1].src = "images/pcbboard_overlay.png";
OverlayPic[2] = new Image(); 
OverlayPic[2].src = "images/backplane_overlay.png";
OverlayPic[3] = new Image(); 
OverlayPic[3].src = "images/cable_overlay.png";

function categoryShoHide(id){
  if (window.document.getElementById(id).style.display == 'none'){
  window.document.getElementById('ioboard').style.display = 'none';
    window.document.getElementById('pcbboard').style.display = 'none';
      window.document.getElementById('backplane').style.display = 'none';
      window.document.getElementById('cable').style.display = 'none';
      window.document.getElementById('wiretowire').style.display = 'none';
          window.document.getElementById(id).style.display = 'inline';

  }else{
    window.document.getElementById(id).style.display = 'none';
  }
}
function categoryHLight(id)
{

  window.document.getElementById('ioboard').style.color = '#565252';
    window.document.getElementById('pcbboard').style.color = '#565252';
      window.document.getElementById('backplane').style.color = '#565252';
      window.document.getElementById('cable').style.color = '#565252';
      window.document.getElementById('wiretowire').style.color = '#565252';
          window.document.getElementById(id).style.color = '#01B60F';  window.document.getElementById('tt_ioboard').style.color = '#565252';
    window.document.getElementById('tt_pcbboard').style.color = '#565252';
      window.document.getElementById('tt_backplane').style.color = '#565252';
      window.document.getElementById('tt_cable').style.color = '#565252';
      window.document.getElementById('tt_wiretowire').style.color = '#565252';
        window.document.getElementById('tt_' + id).style.color = '#01B60F';
}
function categoryNoHLight()
{
  window.document.getElementById('ioboard').style.color = '#565252';
    window.document.getElementById('pcbboard').style.color = '#565252';
      window.document.getElementById('backplane').style.color = '#565252';
      window.document.getElementById('cable').style.color = '#565252';
      window.document.getElementById('wiretowire').style.color = '#565252';
}
function picLoad(id)
{
	window.document.getElementById('OverLayImage').src = OverlayPic[id].src;
	window.document.getElementById('OverLay').style.display = 'block';
}
function picUnload()
{
	window.document.getElementById('OverLayImage').src="images/spacer.gif";
	window.document.getElementById('OverLay').style.display = 'none';
}