test   - 判断字符串是否符合规定的正则
	rep = /\d+/;
	rep.test("asdfoiklfasdf89asdfasdf")
	# true
	
	rep = /^\d+$/;	//加上^(首)$(尾)就必须所有的字符串都符合规定的正则
	rep.test("asdfoiklfasdf89asdfasdf")
	# false
	
exec   - 获取匹配的数据
	rep = /\d+/;
	str = "wangshen_67_houyafa_20"
	rep.exec(str)	//将规定的正则取出来，默认只能取出一个
	# ["67"]
	
	JavaScript is more fun than Java or JavaBeans!
	var pattern = /\bJava(\w*)\b/;	//用()括起来会将匹配(\w*)的字段也输出
	# ["JavaScript", "Script"]
	
	
	JavaScript is more fun than Java or JavaBeans!
	var pattern = /\bJava\w*\b/g;	//g 全局匹配，匹配所有相关的
	# ["JavaScript"]
	# ["Java"]
	# ["JavaBeans"]
	# null
	
	JavaScript is more fun than Java or JavaBeans!
	var pattern = /\bJava(\w*)\b/g;	//加()同理
	# ["JavaScript",‘Script‘]
	# ["Java", ""]
	# ["JavaBeans", "Beans"]
	# null

        JS正则匹配时本身就是支持多行，此处多行匹配只是影响正则表达式^和$，m模式也会使用^$来匹配换行的内容)
        var pattern = /^Java\w*/gm;
        var text = "JavaScript is more fun than \n JavaEE or JavaBeans!";
        result = pattern.exec(text)
        result = pattern.exec(text)
        result = pattern.exec(text)
　　　　 # ["JavaScript"]
　　　　 # ["Java"]
　　　　 # ["JavaBeans"]

默认事件先执行：
	checkbox
自定义先执行
	a
	submit
	...
<form>
	
	<input type=‘type‘ />
	<input type=‘password‘ />
	<input type=‘submit‘ />
	
</form>

$(‘:submit‘).click(function(){    //判断填入是否满足要求的模型
	
	$(‘:text,:password‘).each(function(){
		...
		return false;
	})
	return false;
})   

input,checbox