function m_open(){
if(m.style.visibility == "hidden"){
m.style.posLeft = document.body.scrollLeft + event.clientX + 2;
m.style.posTop = document.body.scrollTop + event.clientY + 2;
m.style.visibility = "visible";
}else if(m.style.visibility == "visible"){
m.style.visibility = "hidden";
}
}