jQuery test liveness of URL

jquery-test-url-with-retry.js

function testURL(url, retryInterval, maxRetryInterval) {
	$.ajax({
		url: url,
		type: "GET",
		timeout: 2000,
		success: function(resp) {
			console.log(url + " is alive!")
		},
		error: function(x, t, m) {
			if (t == 'timeout') {
				console.log("timeout-retry: " + retryInterval)
			} else {
				console.log("error-retry: " + retryInterval)
			}
			retryInterval *= 1.5;
			setTimeout(function() {
				testURL(url, Math.min(retryInterval, maxRetryInterval), 30000)	
			}, retryInterval);
		}
	});
}