function show_thumb(value) {
	for (f = 1; f < 999; f++)
		{
		if (document.getElementById('med' + f))
			{document.getElementById('med' + f).style.display = "none";}
		else
			{break;}
		}

	document.getElementById('med' + value).style.display = "block";
}



function ins_num(e) {
var key = window.event ? e.keyCode : e.which;
var keychar = String.fromCharCode(key);

/* FF */
if (e == "[object KeyboardEvent]")
	{
	with (e.which)
		{
		if ( (key <= -1) || (key >= 1) && (key <= 7) || (key >= 9) && (key < 48) || (key > 57) )
			{return false;}
		}
	}

/* IE */
if (e == "[object]")
	{
	with (event)
		{
		if ( (key < 48) || (key > 57) )
			{returnValue = false;}
		}
	}
}



function ins_num_dot(e) {
var key = window.event ? e.keyCode : e.which;
var keychar = String.fromCharCode(key);

/* FF */
if (e == "[object KeyboardEvent]")
	{
	with (e.which)
		{
		if ( (key <= -1) || (key >= 1) && (key <= 7) || (key >= 9) && (key != 44) && (key != 46) && (key < 48) || (key > 57) )
			{return false;}
		}
	}

/* IE */
if (e == "[object]")
	{
	with (event)
		{
		if ( (key != 44) && (key != 46) && (key < 48) || (key > 57) )
			{returnValue = false;}
		}
	}
}


function change_form(h, s) {
	document.getElementById(h).style.display = 'none';
	document.getElementById(s).style.display = 'block';
}