メールアドレス文字列から不正な記号を取り去る

/**
 * メールアドレス文字列から不正な記号を取り去る
 *
 * usage:
 * SafetyEmail.render(str);
 *
 * @author ao-system
 */
var SafetyEmail = {
	render: function(str) {
		var replaceFm = new Array(
			'＠','．','＿','－','０','１','２','３','４','５','６','７','８','９'
			,'ａ','ｂ','ｃ','ｄ','ｅ','ｆ','ｇ','ｈ','ｉ','ｊ','ｋ','ｌ','ｍ'
			,'ｎ','ｏ','ｐ','ｑ','ｒ','ｓ','ｔ','ｕ','ｖ','ｗ','ｘ','ｙ','ｚ'
			,'Ａ','Ｂ','Ｃ','Ｄ','Ｅ','Ｆ','Ｇ','Ｈ','Ｉ','Ｊ','Ｋ','Ｌ','Ｍ'
			,'Ｎ','Ｏ','Ｐ','Ｑ','Ｒ','Ｓ','Ｔ','Ｕ','Ｖ','Ｗ','Ｘ','Ｙ','Ｚ'
		);
		var replaceTo = new Array(
			'@','.','_','-','0','1','2','3','4','5','6','7','8','9'
			,'a','b','c','d','e','f','g','h','i','j','k','l','m'
			,'n','o','p','q','r','s','t','u','v','w','x','y','z'
			,'a','b','c','d','e','f','g','h','i','j','k','l','m'
			,'n','o','p','q','r','s','t','u','v','w','x','y','z'
		);
		for (var key in replaceFm) {
			str = str.replace(new RegExp(replaceFm[key], 'g'),replaceTo[key]);
		}
		str = str.toLowerCase();
		var result = inArrayStr(str,replaceTo);
		return result;

		function inArrayStr(str,searchAry) {
			var strAry = str.split('');
			var result = '';
			for (var key in strAry) {
				if (inArray(strAry[key],searchAry)) {
					result += strAry[key];
				}
			}
			return result;
		}
		function inArray(needle,ary) {
			for (var key in ary) {
				if (needle == ary[key]) {
					return true;
				}
			}
			return false;
		}
	}
};