var defaultUsername = 'my login id';
var defaultPassword = 'my password';
function InitUsername()
{
    var obj = document.getElementById("_ctl0_editLogin");
	if (obj.value = '')
	{
		obj.value = defaultUsername;
	}
}
function InitPage()
{
    var obj = document.getElementById("_ctl0_editLogin");
	obj.value = defaultUsername;
	
	obj = document.getElementById("_ctl0_editPassword");
	obj.value = defaultPassword;
}
function ClearUsername()
{
    var obj = document.getElementById('_ctl0_editLogin');
	var sUsername = obj.value;
	if (sUsername == defaultUsername)
	{
		obj.value = '';
	}
}
function ClearPassword()
{
    var obj = document.getElementById("_ctl0_editPassword");
	var sPassword = obj.value;
	if (sPassword == defaultPassword)
	{
		obj.value = '';
	}
}