var lastSubmit = false;

/**
 * Submit a form then don't allow it to be submitted again with 5 seconds
 */
function submitFormOnce(formId)
{
	if(lastSubmit)
	{
		var now = new Date().getTime();
		if((now - lastSubmit) < 5000) return;
	}

	var f = document.getElementById(formId);
	if(f)
	{
		lastSubmit = new Date().getTime();
		f.submit();
	}
}