function shown(num)
{
	var id='m';
	document.getElementById(id+num).style.visibility='visible';
}
function mhide()
{
	var id='m'
	for(var i=3; i<=5;i++)
	{
		document.getElementById(id+i).style.visibility='hidden';
	}
}

function getCheckedValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}