JS sentence URL is available (JS sentence segment network is not usable)

The following personal tests are possible:

Compatible with all browsers, with jquery, can be used to determine whether a segment URL is available, you can also determine whether the network is unavailable (premise: If the URL is available, return is not 200, it means that the network is not available, can be used as a network of the sentence)

$.ajax ({

URL: ' http://some.url.com ',
Type: ' GET ',
Complete:function (response) {
if (Response.Status = = 200) {
Alert (' effective ');
} else {
Alert (' invalid ');
}
}

});

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JS sentence URL is available (JS sentence segment network is not usable)