function validate_required(field,alerttxt)
{
	with (field)
	{
		if (value==null||value=="") {alert(alerttxt);return false}
		else {return true}
	}
}

function validate_email(field,alerttxt)
{
	with (field)
	{
		apos=value.indexOf("@")
		dotpos=value.lastIndexOf(".")
		if (apos<1||dotpos-apos<2) {alert(alerttxt);return false}
		else {return true}
	}
}

function sch(fore, back)
{
	$('#scheme').css('color',fore);
	$('#scheme').css('background-color',back);
	$('#foregroundcolor').val(fore);
	$('#backgroundcolor').val(back);
}