if (document.layers) { 
	document.captureEvents(Event.MOUSEMOVE);
	document.onmousemove = captureMousePosition;
	} else if (document.all) { 
		document.onmousemove = captureMousePosition;
                    } else if (document.getElementById) { 
                        document.onmousemove = captureMousePosition;
                    }
                    xMousePos = 0;
                    yMousePos = 0;
                    xMousePosMax = 0; 
                    yMousePosMax = 0;

function captureMousePosition(e) {
	if (document.layers) {
		xMousePos = e.pageX;
		yMousePos = e.pageY;
		xMousePosMax = window.innerWidth+window.pageXOffset;
		yMousePosMax = window.innerHeight+window.pageYOffset;
		mostrar_logo();
	} else if (document.all) {
		xMousePos = window.event.x+document.body.scrollLeft;
		yMousePos = window.event.y+document.body.scrollTop;
		xMousePosMax = document.body.clientWidth+document.body.scrollLeft;
		yMousePosMax = document.body.clientHeight+document.body.scrollTop;
		mostrar_logo();
	} else if (document.getElementById) {
		xMousePos = e.pageX;
		yMousePos = e.pageY;
		xMousePosMax = window.innerWidth+window.pageXOffset;
		yMousePosMax = window.innerHeight+window.pageYOffset;
		mostrar_logo();
		}
	}