function show_info(div_id) {
	document.getElementById(div_id).style.visibility 	= "visible";
	//document.getElementById(div_id).style.left  			= (global_x) + "px";
	//document.getElementById(div_id).style.top 				= (global_y) + "px";
}
function hide_info(div_id) {
			document.getElementById(div_id).style.visibility 	= "hidden";
}