function visible()
{

document.getElementById('tab1').style.display			= "none";
document.getElementById("tab1").style.visibility		= "hidden";
document.getElementById('5').style.display			= "block";
document.getElementById("5").style.visibility		= "visible";
document.getElementById('6').value			= "Not more than 500 Email id's";
document.getElementById('6').style.display			= "none";
document.getElementById("6").style.visibility		= "hidden";
document.getElementById("n").checked="checked";
}

function invisible()
{

document.getElementById('tab1').style.display			= "block";
document.getElementById("tab1").style.visibility		= "visible";
}

function textvisible()
{
document.getElementById('5').style.display			= "block";
document.getElementById("5").style.visibility		= "visible";
document.getElementById('6').style.display			= "none";
document.getElementById("6").style.visibility		= "hidden";
document.getElementById('6').value="Not More than 500 email id's";	
}

function textinvisible()
{
document.getElementById('5').style.display			= "none";
document.getElementById("5").style.visibility		= "hidden";
document.getElementById('6').style.display			= "block";
document.getElementById("6").style.visibility		= "visible";
}

function typetext()
{
	document.getElementById('6').value="";	
}