var is_ie = navigator.appName == 'Microsoft Internet Explorer';
var is_op = navigator.appName == 'Opera' ? true : false;
var is_ns = !is_ie && !is_op ? true : false;
function js_drag(e,elemento)
{
    e||window.event;
    var e = e;
    var Obj = new Object(); 
    var body  = document.getElementsByTagName('body')[0];
    Obj.zI = 0;
    Obj.Elemento = typeof(elemento) == 'object' ? elemento : document.getElementById(elemento);
    
    js_position = function(ly,x,y)
    {
        x = is_ie||is_op ? e.clientX + document.documentElement.scrollLeft + body.scrollLeft : e.clientX + window.scrollX;
        y = is_ie||is_op ? e.clientY + document.documentElement.scrollTop + body.scrollTop : e.clientY + window.scrollY;
        Obj.startX=x;
        Obj.startY=y;
        Obj.startL=parseInt(Obj.Elemento.style.left,10);
        Obj.startT=parseInt(Obj.Elemento.style.top,10);
        Obj.startL=isNaN(Obj.startL) ? 0 : Obj.startL;
        Obj.startT=isNaN(Obj.startT) ? 0 : Obj.startT;
        Obj.Elemento.style.zIndex = ++Obj.zI;
        
        js_addEvent(document,'mousemove',startdrag);
        js_addEvent(document,'mouseup',enddrag);
        js_addEvent(document,'keypress',enddrag);
        
        if(is_ie){    e.cancelBubble = true;    e.returnValue = false;    } else
        {
            e.preventDefault();
        }
    };
    
    startdrag = function(e)
    {
        var x, y;
        e||event;
        x = is_ie||is_op ? e.clientX + document.documentElement.scrollLeft + body.scrollLeft : e.clientX + window.scrollX;
        y = is_ie||is_op ? e.clientY + document.documentElement.scrollTop + body.scrollTop : e.clientY + window.scrollY;
        
        ILeft = ( Obj.startL + x - parseInt(Obj.startX)    );
        ITop = ( Obj.startT + y - parseInt(Obj.startY) );
        
        js_moveTo(Obj.Elemento,ILeft,ITop);
        
        if(is_ie){    e.cancelBubble = true; e.returnValue = false;    }else
        {
            e.preventDefault();
        }
    };
    
    enddrag = function (e)
    {
		js_detEvent(document,'mousemove',startdrag);
        js_detEvent(document,'mouseup',enddrag);
    };
    
    js_position(Obj.Elemento,e.clientX,e.clientY);
};

js_moveTo = function(element,Left,Top)
{
    element.style.left = Left + "px";
    element.style.top  = Top + "px";
};

js_addEvent = function(Layer,eventype,func)
{
    if( is_ns )
        Layer.addEventListener( eventype, func, true );
    else if( is_ie )
        Layer.attachEvent( "on" + eventype, func );
    else
        Layer[ "on" + eventype ] = func;
};

js_detEvent = function(Layer,typef,func)
{
    if(is_ie)
        Layer.detachEvent("on" + typef, func);
    else if(is_ns)
        Layer.removeEventListener( typef, func, true);
    else
        Layer["on" + typef] = null;
};


var IEx = document.all?true:false
if (!IEx) document.captureEvents(Event.MOUSEMOVE)
document.onmousemove = getMouseXY;
function getMouseXY(e) {
	if(IEx){
		coorX=event.clientX+document.documentElement.scrollLeft;
		coorY=event.clientY+document.documentElement.scrollTop;
	}else{
		coorX=e.pageX;
		coorY=e.pageY;
	}
	if (coorX<0){coorX=0}
	if (coorY<0){coorY=0}
	return true
}