function showPic(whichpic) {
	if (document.getElementById) {
		var i=whichpic.href;
		document.getElementById('mainImage').src = i;		
		if (whichpic.title) {
   			document.getElementById('pcol4').innerHTML = '<p>'+whichpic.title+'</p>';
		}
		else
		{
			document.getElementById('pcol4').innerHTML = '';
		}
		if (whichpic.rel) {
			if (whichpic.rev == "local")
			{
				document.getElementById('pcol5').innerHTML = '<a class="purchase" href="purchase.php?p='+whichpic.rel+'"><img src="img/local_purchase.png" width="151" height="20" alt="" border="0" /></a>';
			}
			else
			{
				document.getElementById('pcol5').innerHTML = '<a class="purchase" href="purchase.php?p='+whichpic.rel+'"><img src="img/purchase.png" width="110" height="20" alt="" border="0" /></a>';
			}
		}
		else
		{
			document.getElementById('pcol5').innerHTML = '<img src="img/store_purchase.png" width="151" height="20" alt="" />';
		}
		return false;
	}
	else {
		return true;
	}
}

function prepareGallery(){
  if( document.getElementById &&
      document.getElementsByTagName ){
    if( document.getElementById( 'pcol2' ) ){
      var gallery = document.getElementById( 'pcol2' );
      var links = gallery.getElementsByTagName( 'a' );
      for( var i=0; i < links.length; i++ ){
        links[i].onclick = function(){
          return showPic(this);
        };
      }
    }
  }
}



window.onload = prepareGallery;