js正则

JS正则

test：判断字符串是否符合规定的正则

	rep = /\d+/;
	rep.test("asdfoiklfasdf89asdfasdf")
	# true

	rep = /^\d+$/;
	rep.test("asdfoiklfasdf89asdfasdf")
	# true

Script：获取匹配的数据

	rep = /\d+/;
	str = "wangshen_67_houyafa_20"
	rep.exec(str)
	# ["67"]

	JavaScript is more fun than Java or JavaBeans!
	var pattern = /\bJava(\w*)\b/;
	# ["JavaScript", "Script"]

	JavaScript is more fun than Java or JavaBeans!
	var pattern = /\bJava\w*\b/g;
	# ["JavaScript"]
	# ["Java"]
	# ["JavaBeans"]
	# null

	JavaScript is more fun than Java or JavaBeans!
	var pattern = /\bJava(\w*)\b/g;
	# ["JavaScript",'Script']
	# ["Java", ""]
	# ["JavaBeans", "Beans"]
	# null

JavaScript is more fun than Java or JavaBeans!

var pattern = /\bJava(\w*)\b/g;

这个会先打印出匹配到的字符串，如：JavaScript，并打印出（）匹配到的如：Script。

多行匹配：

默认就是多行匹配

	但是不能匹配第二行的^和$，使用m参数即可解决此问题，/.../m 表示多行匹配

标签事件执行顺序

	默认事件先执行：
		checkbox
	//先把checkbox的值变成true或false再执行自定义事件
	自定义先执行
		a
		submit
		...
	//这些都是自定义的事件先执行