function gWindowGetClient(elmnt) {
	var notes = null;
	var result = null;

	for (var i = 0; i < elmnt.childNodes.length; i++) {
    	if (elmnt.childNodes[i].className == "GUIwindowClient") {
    		result = elmnt.childNodes[i];
      		break;
    	}
	}

	return result;
}


function gWindowGetHead(elmnt) {
	var notes = null;
	var result = null;

	for (var i = 0; i < elmnt.childNodes.length; i++) {
    	if (elmnt.childNodes[i].className == "GUIwindowHead") {
    		result = elmnt.childNodes[i];
      		break;
    	}
	}

	return result;
};


function gWindowDragElement(elmnt) {
	var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;

	if (gWindowGetHead(elmnt) != null) {
		// if present, the header is where you move the DIV from:
		gWindowGetHead(elmnt).onmousedown = dragMouseDown;
	} else {
		// otherwise, move the DIV from anywhere inside the DIV: 
		elmnt.onmousedown = dragMouseDown;
	}

	function dragMouseDown(e) {
		e = e || window.event;
		e.preventDefault();
		// get the mouse cursor position at startup:
		pos3 = e.clientX;
		pos4 = e.clientY;
		document.onmouseup = closeDragElement;
		// call a function whenever the cursor moves:
		document.onmousemove = elementDrag;
	}

	function elementDrag(e) {
		e = e || window.event;
		e.preventDefault();
		// calculate the new cursor position:
		pos1 = pos3 - e.clientX;
		pos2 = pos4 - e.clientY;
		pos3 = e.clientX;
		pos4 = e.clientY;
		// set the element's new position:
		elmnt.style.top = (elmnt.offsetTop - pos2 - 1) + "px";
		elmnt.style.left = (elmnt.offsetLeft - pos1 - 1) + "px";
	}

	function closeDragElement() {
		// stop moving when mouse button is released:
		document.onmouseup = null;
		document.onmousemove = null;
	}
}

function gWindowCreate(id, title, sizex, sizey, clientHTML) {
	var win = document.getElementById(id);
	if (!win) {
		debug("create Title:" + title);
	
		var head = document.createElement("div");
		head.setAttribute("id", id+"Head");
		head.setAttribute("class", "GUIwindowHead");
		head.innerHTML = title;

		var client = document.createElement("div");
		client.setAttribute("id", id+"Client");
		client.setAttribute("class", "GUIwindowClient");
		client.setAttribute("style", "max-height:"+sizey+"px;max-width:"+sizex+"px;");
		client.innerHTML = clientHTML;

		win = document.createElement("div");
		win.setAttribute("id", id);
		win.setAttribute("class", "GUIwindow");
		win.appendChild (head);
		win.appendChild (client);
		
		document.body.appendChild(win);
		gWindowDragElement(win);
		debug ("move to 100px from top");
		win.style.top = "100px";
	}
	return win;
}


function gWindowCreateSize(id, title, sizex, sizey) {
	var win = document.getElementById(id);
	if (!win) {
		debug("create Title:" + title);
	
		var head = document.createElement("div");
		head.setAttribute("id", id+"Head");
		head.setAttribute("class", "GUIwindowHead");
		head.innerHTML = title;

		var client = document.createElement("div");
		client.setAttribute("id", id+"Client");
		client.setAttribute("class", "GUIwindowClient");
		client.setAttribute("style", "max-height:"+sizey+"px;max-width:"+sizex+"px;");
		client.style.height = sizey+"px";
		client.style.width = sizex+"px";

		win = document.createElement("div");
		win.setAttribute("id", id);
		win.setAttribute("class", "GUIwindow");
		win.appendChild (head);
		win.appendChild (client);
		document.body.appendChild(win);
		gWindowDragElement(win);
		debug ("move to 100px from top");
		win.style.top = "100px";
	}
	return win;
}