function sortTables(col) {
	sortTable("subfolders", col);
	sortTable("files", col);
	fixRows("details-table");

}

function sortTable(id, col) {
	var table = document.getElementById(id);
	if (table.sortAsc == null || table.lastSorted != col) {
		table.sortAsc = true;
		table.lastSorted = col;
	} else {
		table.sortAsc = !table.sortAsc;
	}
	var tmp, i, j, sval, sx, test, cmp;
	for (i = 0; i < table.rows.length - 1; i++) {
		sx = i;
		sval = getInnerText(table.rows[i].cells[col]);
		for (j = i + 1; j < table.rows.length; j++) {
			test = getInnerText(table.rows[j].cells[col]);
			cmp = compareValues(sval, test, col);
			if (table.sortAsc) cmp = -cmp;
			if (cmp > 0) {
				sx = j;
				sval = test;
			}
		}
		if (sx > i) {
			tmp = table.removeChild(table.rows[sx]);
			table.insertBefore(tmp, table.rows[i]);
		}
	}
	showArrows(col, table.sortAsc);
}

function fixRows(table) {
	table = document.getElementById(table);
	var i, row;
	for (i = 1; i < table.rows.length; i++) {
		row = table.rows[i];
		if (i % 2 != 0)
			row.className = "tc1";
		else
			row.className = "tc2";
	}
}

function showArrows(col, down) {
	var i, img, cells;
	cells = document.getElementById("details-table").rows[0].cells;
	for (i = 0; i < cells.length; i++) {
		if (cells[i].lastChild.tagName == "IMG") {
			cells[i].removeChild(cells[i].lastChild);
		}
	}
	img = document.createElement("IMG");
	img.setAttribute("src", (down) ? "http://italsoluzioni.dyndns.org:8000/./_@_/FileBrowser/images/sort-down.gif" : "http://italsoluzioni.dyndns.org:8000/./_@_/FileBrowser/images/sort-up.gif");
	cells[col].appendChild(img);
}

function getInnerText(el) {
	var i, s;
	s = "";
	for (i = 0; i < el.childNodes.length; i++) {
		if (el.childNodes[i].nodeType == 3)
			s += el.childNodes[i].nodeValue;
		else if (el.childNodes[i].nodeType == 1 && el.childNodes[i].tagName == "BR")
			s += " ";
		else
			s += getInnerText(el.childNodes[i]);
	}
	return s;
}

function compareValues(v1, v2, col) {
	switch(col) {
		case 1:
		case 3:
			v1 = v1.toLowerCase();
			v2 = v2.toLowerCase();
			break;
		case 2:
			v1 = toSize(v1);
			v2 = toSize(v2);
			break;
		case 4:
			v1 = toDate(v1);
			v2 = toDate(v2);
			break;
		default:
			break;
	}
	if (v1 == v2) return 0;
	if (v1 > v2) return 1;
	return -1;
}

function toSize(str) {
	var lr = str.split(" ");
	if (lr[1] == "bytes") {
		return lr[0] * 1;
	} else if (lr[1] == "KB") {
		return lr[0] * 1024;
	} else if (lr[1] == "MB") {
		return lr[0] * 1048576;
	} else if (lr[1] == "GB") {
		return lr[0] * 1073741824;
	}
	return lr[0] * 1;
}

function toDate(str) {
	var parts = str.split(" ");
	var date = parts[0].split("/");
	var time = parts[1].split(":");
	if (time[3] == "PM") time[0] += 12;
	return Date.UTC(date[2],parseInt(date[1])-1,date[0],time[0],time[1],time[2]);
}