function change_inner(status)
{
	if(status=='1')
	{
	document.getElementById('imageShow').style.display = 'none';
	document.getElementById('videoShow').style.display = 'block';
	
	}
	else if(status=='2')
	{
	document.getElementById('imageShow').style.display = 'block';
	document.getElementById('videoShow').style.display = 'none';

	}

}


function username_show(x)
{

	if(document.getElementById(x).value=="username")
	{
		document.getElementById(x).value=""
	}
}

function username_hide(id)

{

	if(document.getElementById(id).value=="")
	{
		document.getElementById(id).value="username";
	}

}
function password_show(id)
{	
	if(document.getElementById(id).value=="password")
	{
		document.getElementById(id).value=""
	}
}

function password_hide(id)
{

	if(document.getElementById(id).value=="")
	{
		document.getElementById(id).value="password";
	}

}