function checkLogin() {
	if ((document.login.username.value == "") || (document.login.username.value == "Username") || (document.login.password.value == "") || (document.login.password.value == "Password") ) {
		return false;
	}
}
function eraseUsername() {
	if (document.login.username.value == "Username") {
		document.login.username.value = "";
	}
}
function erasePassword() {
	if (document.login.password.value == "Password") {
		document.login.password.value = "";
	}
}
function fillUsername() {
	if (document.login.username.value == "") {
		document.login.username.value = "Username";
	}
}
function fillPassword() {
	if (document.login.password.value == "") {
		document.login.password.value = "Password";
	}
}