var last_id;
var last_filename;

function project_text(id) {
	if(last_id != undefined) {
		var gridElem = document.getElementById("text_" + last_id);
		if(gridElem) { gridElem.style.display = "none"; }
		last_id = undefined;
	}
	var gridElem = document.getElementById("text_" + id);
	if(gridElem) {
		gridElem.style.display = "block";
		last_id = id;
	}
}

function image_enlarge(id, filename, title) {
	var enlargeElem = document.getElementById("enlarged");
	if(enlargeElem) {
		var mg = new Image();
		last_filename = "images/" + filename;
		enlargeElem.title = title;
		mg.onload = image_enlarge_loaded;
		mg.src = last_filename;
	}
}

function image_enlarge_loaded() {
	var enlargeElem = document.getElementById("enlarged");
	if(enlargeElem) { enlargeElem.src = last_filename; }
}