var getByClass = function(searchClass, node, tag) {
if (document.getElementsByClassName) {
return document.getElementsByClassName(searchClass)
} else {
node = node || document;
tag = tag || "*";
var classes = searchClass.split(" "),
elements = (tag === "*" && node.all) ? node.all : node.getElementsByTagName(tag),
patterns = [],
returnElements = [],
current,
match;
var i = classes.length;
while (--i >= 0) {
patterns.push(new RegExp("(^|//s)" + classes[i] + "(//s|$)"));
}
var j = elements.length;
while (--j >= 0) {
current = elements[j];
match = false;
for (var k = 0, kl = patterns.length; k < kl; k++) {
match = patterns[k].test(current.className);
if (!match) break;
}
if (match) returnElements.push(current);
}
return returnElements;
}
}
紀錄一下,一個獲取className的函數
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