function Login(){
var done=0;
var username=document.login.username.value;
username=username.toLowerCase();
var password=document.login.password.value;
password=password.toLowerCase();
if (username=="david" && password=="west") { window.location="index.htm"; done=1; }
if (username=="bob" && password=="west") { window.location="index.htm"; done=1; }
if (username=="ns" && password=="ns8282") { window.location="nutrition_specialist_center.htm"; done=1; }
if (username=="nm" && password=="nm8585") { window.location="nutrition_manager_center.htm"; done=1; }
if (username=="re" && password=="re2626") { window.location="research_library.htm"; done=1; }
if (username=="jane" && password=="pentz") { window.location="index.htm"; done=1; }
if (done==0) { alert("Invalid login!"); }
}