R

radio buttons, HTML, 531–533

Rails, 251, 281–286, 290, 291

readyState property, XMLHttpRequest, 90, 91, 92, 96, 177

REMOTE_ADDR server variable, $_SERVER, 557

REMOTE_HOST server variable, $_SERVER, 557

REMOTE_PORT server variable, $_SERVER, 557

replaceAll method, 595

replaceNode method, JavaScript, 299

replacer action, 283

request object, 661

REQUEST_METHOD, 557

REQUEST_URI server variable, $_SERVER, 557

requestFile property, Sack framework, 219

Reset button, 45, 524

response property, Sack framework, 219

responseBody property, XMLHttpRequest, 90

responseStatus property, Sack framework, 219

responseStream property, XMLHttpRequest, 90

responseText property, XMLHttpRequest, 90, 91, 92

responseXML property, 90, 91, 92, 219

ResponseXml property, XMLHttpRequest object, 115, 181

restricted user access, 631–642, 654–659

returning values from functions, 57–59

right style, CSS, 416

rtrim string function, PHP, 483

Ruby on Rails

accessing downloaded data in code, 288–294

downloading text with Ajax, 282–288

overview, 281–282

RubyGems, 282

runAJAX function, Sack framework, 217

runAjax method, Sack object, 220