/**
 * Implements the Did You Know ajax support for the home page
 * Currently, this fires every 7 seconds (7000 milliseconds)
 * Update this if you like.
 *
*/
var url = "/didyouknow/facts.json";
var interval = 20000;


/***********************************************
    Don't edit anything below this line
***********************************************/
function changeTip(){
	var the_object;
	var http_request = new XMLHttpRequest();
	http_request.open( "GET", url , true );
	http_request.send(null);
	http_request.onreadystatechange = function () {
    	if ( http_request.readyState == 4 ) {
            if ( http_request.responseText.length > 0) {
            	the_object = eval(http_request.responseText);
                var rn = Math.floor(Math.random()* the_object.length);
                var val = document.getElementById("didYouKnowValue");
                val.innerHTML = the_object[rn];              
        	} else {
            	alert( "There was a problem getting the did you know tip.\nResponse: " + http_request.status + "\nText: " + http_request.responseText );
        	}
        	http_request = null;
    	}
	}
};

setInterval ( "changeTip()", interval);
setTimeout("changeTip()", 500);