RSLite - A cookie-based AJAX solution

This is another solution written by Brent Ashley for asynchronous information fetching, way before the term AJAX were coined var RSLite; function RSLiteObject(){ this.interval = 1000; this.attempts = 3; this.i = new Image(); this.call = function (page){ var d = new Date(); document.cookie = 'RSLite=x; expires=Fri, 31 Dec 1999 23:59:59 GMT; path=/;'; this.i.src = page+'&time='+d.getTime(); setTimeout("RSLite.receive(1);", this.interval ); } this.receive = function ( attempt ){ var response = null; var aCookie = document.cookie.split("; "); for (var i=0; i < aCookie.length; i++){ var aCrumb = aCookie[i].split("="); if (aCrumb[0] == 'RSLite') response = aCrumb[1]; } if ( response != null ){ this.callback( unescape(response.replace(/\+/g,' ')) ); } else { if (attempt < this.attempts){ setTimeout( "RSLite.receive( " + (attempt+1) +" );",this.interval); } else { this.failure(); } } } this.callback = function( response ){ alert(response); } this.failure = function(){ //alert("Timed Out ["+this.i.src+"]"); // disable for the time moment } } function myCallback(response) { // write the result back var tmpObj = document.getElementById('ResponseArea'); if (tmpObj != null) { tmpObj.innerHTML = response; } // if } RSLite = new RSLiteObject(); RSLite.callback = myCallback;