Regular Expressions – Check Integer

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function checkint(str) {
    var regex = /^[1-9]+\d*$|^-[1-9]+\d*$/;
    re = new RegExp(regex);
    return (str.match(regex)) != null ? "true" : "fasle";
}

function checkint(str) { var regex = /^[1-9]+\d*$|^-[1-9]+\d*$/; re = new RegExp(regex); return (str.match(regex)) != null ? "true" : "fasle"; }