var viewArtworkWindow = null;

function viewArtwork(artworkId){

	var width = 550;
	var height = 550;
	
	if(!viewArtworkWindow || viewArtworkWindow.closed){
		viewArtworkWindow = window.open("includes/viewArtwork.php?artworkId=" + artworkId, "viewArtworkWindow", "location=no,menubar=no,resizable=yes,scrollbars=auto," + centerWindow(width,height));
	}
	
	viewArtworkWindow.focus();
}



var viewExhibitionImageWindow = null;

function viewExhibitionImage(exhibitionImageId){

	var width = 550;
	var height = 550;
	
	if(!viewExhibitionImageWindow || viewExhibitionImageWindow.closed){
		viewExhibitionImageWindow = window.open("includes/viewExhibitionImage.php?exhibitionImageId=" + exhibitionImageId, "viewExhibitionImageWindow", "location=no,menubar=no,resizable=yes,scrollbars=auto," + centerWindow(width,height));
	}
	
	viewExhibitionImageWindow.focus();
}



function centerWindow(width,height) {

	var str = "height=" + height + ",innerHeight=" + (height+30);
	str += ",width=" + width + ",innerWidth=" + width;
	if (window.screen) {
		var ah = screen.availHeight - 30;
		var aw = screen.availWidth - 10;

		var xc = (aw - width) / 2;
		var yc = (ah - height) / 2;

    	str += ",left=" + xc + ",screenX=" + xc;
    	str += ",top=" + yc + ",screenY=" + yc;
  	}
  	return str;
	
}