// JavaScript Document

function toggleLayer( whichLayer )
{
  var elem, vis;
  if( document.getElementById ){ // this is the way the standards work
    elem = document.getElementById( whichLayer );
	document.getElementById( 'specs' ).style.display='none';
	document.getElementById( 'details' ).style.display='none';
	document.getElementById( 'instruct' ).style.display='none';
	document.getElementById( 'FAQ' ).style.display='none';
}else if( document.all ){ // this is the way old msie versions work
      elem = document.all[whichLayer];
	   document.all['specs'].style.display='none';
	  document.all['details'].style.display='none';
	  document.all['instruct'].style.display='none';
	  document.all['FAQ'].style.display='none';
}else if( document.layers ){ // this is the way nn4 works
    elem = document.layers[whichLayer];
	document.layers['specs'].style.display='none';
	 document.layers['details'].style.display='none';
	 document.layers['instruct'].style.display='none';
	 document.layers['FAQ'].style.display='none';
  }
  vis = elem.style;
  
  
 //if the style.display value is blank we try to figure it out here
 if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
 vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
 vis.display = (vis.display==''||vis.display=='block')?'none':'block';
  
}

function changeimg(img){
	var image;
	image = "images/"+img+".gif";
	
	if( document.getElementById ) // this is the way the standards work
    	document.getElementById('bigimg').src = image;
	else if( document.all ) // this is the way old msie versions work
		document.all['bigimg'].src = image;
	else if( document.layers ) // this is the way nn4 works
		document.layers['bigimg'].src = image;
	
}