// JavaScript Document
function mouseX(evt) 
{
	if (evt.pageX) return evt.pageX; //firefox or ns
	else if (evt.clientX)
   	return evt.clientX + (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft);
	else return null;
}
function mouseY(evt) {
if (evt.pageY) return evt.pageY; //firefox or ns
else if (evt.clientY)
   return evt.clientY + (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop);
else return null;
}
function dis_img(id,img_name,img_src, event)
{
	var img_src = document.getElementById('img_src');
	img_src.src = 'img/' + img_name;
	var el_id = document.getElementById(id);
	el_id.style.top = mouseY(event) - 50 + 'px';
	el_id.style.left = mouseX(event) + 50 + 'px';
	el_id.style.visibility = 'visible';
}

function hide_img(id)
{
	var el_id = document.getElementById(id);
	el_id.style.visibility = 'hidden';
}