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var SHORT_1 = new Date("03-25-2015");
var SHORT_2 = new Date("03/25/2015");
var SHORT_3 = new Date("2015/03/25");
var SHORT_4 = new Date("2015-03-25");
document.write( SHORT_1 + "<br/>");
document.write( SHORT_2 + "<br/>");
document.write( SHORT_3 + "<br/>");
document.write( SHORT_4 + "<br/>");