var agt=navigator.userAgent.toLowerCase();
var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));

function DragArea(){
	this.pressed = 0;
	this.resizing = 0;
	this.initEvent;
	this.endEvent;
	this.currentEvent;
}

document.onmousemove = function(event) { _dragArea.moveWindow(event); }
document.onmousedown = function(event) {_dragArea.pressed = 1; hide_preview();};
document.onmouseup = function(event) { _dragArea.pressed = 0 };

counter = 0;
DragArea.prototype.moveWindow = function(e) {
	getPointer(e);
	if (this.pressed){
		var elem =  document.getElementById('dwindow'); // FIXME do not use getElement here
		if (elem != null){
		        var _event  = is_ie ? window.event : e;
			elem.style.left = _event.clientX - 80 + "px";
			elem.style.top = _event.clientY + "px";
		}
	}
}
var _dragArea = new DragArea();