function clear_textbox()
{
	if (document.login_form.username_input.value == "e-mail address")
	document.login_form.username_input.value = "";
	
	else if (document.login_form.password_input.value == "password")
	document.login_form.password_input.value = "";
} 
function login_func()
{
	document.login_form.submit();
}
function checkKey(e) {
		if (document.all) {
			e = window.event;
		}
		
		var key;
	
		if (document.layers)
		{
			key = e.which;
		}
		if (document.all)
		{
			key = e.keyCode
		}
		
		if (key==13)
		{
			login_func();
		}
	}