Search-campaign-general-budget.js

function main() {
    var costReport = AdWordsApp.report("Select Cost from ACCOUNT_PERFORMANCE_REPORT");
    var reportRow = costReport.rows().next();
    var totalCost = reportRow["Cost"].replace(',', '');
    if (totalCost > 1000) {
        var campaignIterator = AdWordsApp.campaigns().withCondition("Status = ENABLED").get();
        while (campaignIterator.hasNext()) {
            var campaign = campaignIterator.next();
            campaign.pause();
        }
    }
}