function setLoginFormValue(inputId,str) {
	inputValue = document.getElementById(inputId).value;
	if (inputValue == str) {
		document.getElementById(inputId).value='';
	} else if (inputValue == '') {
		document.getElementById(inputId).value=str;
	}
}

function login() {
	var frm = document.getElementById('loginForm');
	
	// file to submit the data to
	var postStr = getFormValues(frm);
	
	var xmlHttp = createXmlRequest();
	
	xmlHttp.onreadystatechange=function() {
		// wait for document to recieve all data and begin processing
		if (xmlHttp.readyState == 4) {
			if (xmlHttp.status == 200) {
				result = xmlHttp.responseText;
				document.getElementById('loginFormContainer').innerHTML = result;
			} else {
				alert("der skete en fejl på serveren prøv venligst igen");
			}
		}
	}
	xmlHttp.open('POST', '/login.php', true);
	xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttp.setRequestHeader("Content-length", postStr.length);
	xmlHttp.setRequestHeader("Connection", "close");
	xmlHttp.send(postStr);
}