// JavaScript Document
function changeImage( type, num ) {
	if (document.getElementById) {
		if ( document.images ) {
			if ( type == "prev" ) {
				imgNum--;
				if (imgNum < 0) {
					imgNum = imgLength - 1;
				}
			}
			else if ( type == "next" ) {
				imgNum++;
				if (imgNum >= imgLength) {
					imgNum = 0;
				}
			}
			else if ( type == "disp" ) {
				imgNum = num;
			}
			document.getElementById('propimg').src = 'http:\/\/' + imgServer + propImgs[imgNum] + randomStr;
	
			if ( propCaps[imgNum] == '' ) {
				document.getElementById('propimg').alt = 'Picture ' + ( imgNum + 1 );
				document.getElementById('caption').innerHTML = 'Picture ' + ( imgNum + 1 );
			}
			else {
				document.getElementById('propimg').alt = propCaps[imgNum];
				document.getElementById('caption').innerHTML = propCaps[imgNum];
			}
			document.getElementById('picCounter').innerHTML = '(' + ( imgNum + 1 ) + ' of ' + imgLength + ')';
			
			var superLink = "&nbsp;";
			if (supersizes != null) {
				var supersizeLink = supersizes[imgNum];
				if(supersizeLink != null && supersizeLink != "") {
				   document.getElementById('superimg').href = supersizeUri + '?uri=' + supersizeLink;
				   document.getElementById('superimg').title = 'enlarge image';
				   superLink = 'enlarge image';
				}
				else {
  			      document.getElementById('superimg').removeAttribute('href');
  			      document.getElementById('superimg').removeAttribute('title');
  			   }
			}
			document.getElementById('superSize').innerHTML = superLink;
		}
						
		if ( type == "disp" ) {
			if ( document.getElementById ) {
				var imgElement = document.getElementById('imgTop');
				if ( imgElement && imgElement.scrollIntoView ){
					imgElement.scrollIntoView(1);
				}
			} 
			else {
				window.scrollTo(0,0);
			}
		}
		return false;
	}
	return true;
}