function pwdField(input)
{
	if(input != '')
	{
		var bg;
        if(input.name == 'username')
        {
			bg = 'url(/images/username-bg.gif)';
        }
        else if (input.name == 'password')
        {
            bg = 'url(/images/pwd-bg.gif)';
        }

	    //var test = input;
	    if((input.style.backgroundImage == "none" || input.style.backgroundImage == "") && input.value == '')
	    {
			input.style.backgroundImage = bg;
	        input.style.backgroundRepeat = 'no-repeat';
	    }
	    else if(input.style.backgroundImage == bg)
	    {
			input.style.backgroundImage = "none";
	    }
		else
		{
			input.style.backgroundImage = "none";
		}
	}
}

function removeBg(un, pwd)
{
	var username = document.getElementById(un);
	var password = document.getElementById(pwd);
	if(username != null && password != null)
	{
		if(username.value != '')
	    {
			username.style.backgroundImage = "none";
	    }
		
	    if(password.value != '')
	    {
			password.style.backgroundImage = "none";
	    }
	}
}