Ext.form.VTypes

1、为空验证的两个配置
        allowBlank:false //false则不能为空，默认为true

        blankText:string//当为空时的错误提示信息

items : [{
	fieldLabel : 'ENAME',
	name : 'emp.ename',
	allowBlank : false,
	blankText:"雇员姓名不能为空!"
}]

2、 用vtype格式的验证

        items: [{
                fieldLabel: 'Email',
                name: 'email',
                vtype:'email',
                vtypeText:"不是有效的邮箱地址"
       }]

form验证中vtype的默认支持类型：
        a.alpha //只能输入字母，无法输入其他（如数字，特殊符号等）
        b.alphanum//只能输入字母和数字，无法输入其他
        c.email//email验证，要求的格式是"[email protected]"
        d.url//url格式验证，要求的格式是[url]http://www.langsin.com[/url]

对应的正则表达式：

     alpha = /^[a-zA-Z_]+$/,
        alphanum = /^[a-zA-Z0-9_]+$/,
        email = /^(\w+)([\-+.\'][\w]+)*@(\w[\-\w]*\.){1,5}([A-Za-z]){2,6}$/,
        url = /(((^https?)|(^ftp)):\/\/([\-\w]+\.)+\w{2,3}(\/[%\-\w]+(\.\w{2,})?)*(([\w\-\.\?\\\/+@&#;`~=%!]*)(\.\w{2,})?)*\/?)/i;

3、自定义验证

// custom Vtype for vtype:'time'
var timeTest = /^([1-9]|1[0-9]):([0-5][0-9])(\s[a|p]m)$/i;
Ext.apply(Ext.form.VTypes, {
    // vtype validation function
    time: function(val, field) {
        return timeTest.test(val);
    },
    // vtype Text property: The error text to display when the validation function returns false
    timeText: 'Not a valid time. Must be in the format "12:34 PM".',
    // vtype Mask property: The keystroke filter mask
    timeMask: /[\d\s:amp]/i
});

Ext.form.VTypes Public Properties

Property		Defined By
	alphaMask : RegExp The keystroke filter mask to be applied on alpha input. Defaults to:  /[a-z_]/i	VTypes
	alphaText : String The error text to display when the alpha validation function returns false. Defaults to:  'This field should only contain letters and _'	VTypes
	alphanumMask : RegExp The keystroke filter mask to be applied on alphanumeric input. Defaults to:  /[a-z0-9_]/i	VTypes
	alphanumText : String The error text to display when the alphanumeric validation function returns false. Defaults to:  'This field should only contain letters, numbers and _'	VTypes
	emailMask : RegExp The keystroke filter mask to be applied on email input. See the  email method for information about more complex email validation. Defaults to:  /[a-z0-9_\.\-\+\'@]/i	VTypes
	emailText : String The error text to display when the email validation function returns false. Defaults to:  'This field should be an e-mail address in the format "[email protected]"'	VTypes
	urlText : String The error text to display when the url validation function returns false. Defaults to:  'This field should be a URL in the format "http:/'+'/www.example.com"'	VTypes