function test() { var count = 0; var arr = document.getElementsByTagName("div"); for (var i = 0; i < arr.length; i++) { if (arr[i].id.indexOf("abc") >= 0) count++; } alert(count); }
function test() { var count = 0; var arr = document.getElementsByTagName("div"); for (var i = 0; i < arr.length; i++) { if (arr[i].id.indexOf("abc") >= 0) count++; } alert(count); }正解
function test() { var count = 0; var arr = document.getElementsByTagName("div"); for (var i = 0; i < arr.length; i++) { if (arr[i].id.indexOf("abc") >= 0) count++; } alert(count); }正解
var count = 0;
var arr = document.getElementsByTagName("div");
for (var i = 0; i < arr.length; i++) {
if (arr[i].id.indexOf("abc") >= 0)
count++;
}
alert(count);
}
var count = 0;
var arr = document.getElementsByTagName("div");
for (var i = 0; i < arr.length; i++) {
if (arr[i].id.indexOf("abc") >= 0)
count++;
}
alert(count);
}正解
var count = 0;
var arr = document.getElementsByTagName("div");
for (var i = 0; i < arr.length; i++) {
if (arr[i].id.indexOf("abc") >= 0)
count++;
}
alert(count);
}正解