var marcador1 = 'marcador1'; // div that is to follow the mouse
var marcador2 = 'marcador2'; // div that is to follow the mouse                       // (must be position:absolute)
var offY = 15;          // Y offset from mouse position

function mouseY(evt) {
	if (!evt) evt = window.event; 
	return evt.clientY
}


function follow(evt) {
	if (!evt) evt = window.event; 
	if (document.getElementById) {
		var mouseY, obj1, obj2;
		mouseY = parseInt(evt.clientY);
		if (mouseY>265 &&mouseY<708 ){
			obj1 = document.getElementById(marcador1).style; 
			obj1.visibility = 'visible';		
			obj1.top = mouseY+ 'px';
		 	obj2 = document.getElementById(marcador2).style; 
			obj2.visibility = 'visible';
			obj2.top = mouseY+ 'px';
		}		
	}
}	
document.onmousemove = follow;