js正则匹配查找

var pattern1 = /好/g;
console.log(pattern1.test("你好"));

字符串查找：

var pattern1 = /\w/;
console.log(pattern1.test("njkhjkjk"));

空格查找：

var pattern1 = /\s/;
console.log(pattern1.test("njkhjkjk"));

查找 页面中有几个人字：

var re = "人中人人人人",
		rex = /中/g,
		ary = rex.exec(re),
		i = 0;

		while(ary){
			i++;
			ary = rex.exec(re);
		}

		 console.log(i);

查找“.”后面的文字

var
	str = "a.swf",
	reg = /\./,
	temp = "";

	if(reg.test(str)){

		temp = RegExp.rightContext;

	}

	console.log(temp);