希望这可以帮助您...

Hope this may help you out...

var str = "a,b,c,d,e,f,g";

function getIndexOf(srcString, searchString) {
	var str2Array = srcString.split(',');
	var array2Index = [];
	for(var i = 0; i < str2Array.length; i++) {
		array2Index[str2Array[i]] = i;
	}
	return (typeof array2Index[searchString] != 'undefined' ? array2Index[searchString] : -1);
}

alert(getIndexOf(str,'a'));
alert(getIndexOf(str,'d'));
alert(getIndexOf(str,'g'));
alert(getIndexOf(str,'not found'));

谢谢&问候，
尼拉·索尼尼(Nial Soni)

Thanks & Regards,
Niral Soni

您是说indexOf吗?
例如

Do you mean indexOf?
e.g.

var array = ["foo","boo", "goo"];
var booIndex = array.indexOf("boo")

注意IE(至少是IE7)不支持它.

Note IE (at least IE7) doesn''t support it.