js按指定字符把字符串分割成数组

function strToArray(str){
var arr=str.split(";");
for (i=0;i document.write(arr[i]+"
");
}
}
strToArray('www.111com.net;b;c;d;e')

var str="How are you doing today?"

document.write(str.split(" ") + "
")
document.write(str.split("") + "
")
document.write(str.split(" ",3))

输出的结果也一样是

How
are
you
doing
today