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var ar = ["f1app.txt", "f1", "f2"];
var len = ar.length;
for (var i = 0; i < len; i++) {
for (var j = 0; j < len; j++) {
//debugger;
if (ar[i].indexOf(ar[j]) == 0 && (ar[i].length > ar[j].length)) {
document.write(" <strong>" + i + " </strong>" + ar[i] + " length:" + ar[i].length + " " + " <strong>" + j + " </strong>" + ar[j] + " length:" + ar[j].length + " " + ar[i].indexOf(ar[j]) + " <br/>");
}
}
}
//测试代码
//var str1 = ["f1app.txt"]; var str2 = ["f1"];
//alert(str1[0].indexOf(str2[0]) === 0)
