username validation in javascript

javascript| function First, the Verification class1, digital verification within1.1 Integers1.2 Integers greater than 0 (validation of ID to be transmitted)1.3 Validation of negative integers1.4 integers cannot be larger than IMAX1.5 integers cannot be less than imin2, Time Class2.1 Short time, form (13:04:06)2.2 Short Date, form (2003-12-05)2.3 Long time, shaped

Try testing the following form with valid and invalid email addresses. Code uses javascript to match the users input with a regular expression. Function Code: Copy codeThe Code is as follows: function validate (form_id, email ){ Var reg =/^ ([A-Za-z0-9 _ \-\.]) + \ @ ([A-Za-z0-9 _ \-\.]) + \. ([A-Za-z] {2, 4}) $ /; Var address = document. forms [form_id]. elements [email]. value; If (reg. test (address) = false ){ Alert ('invalid Email address '); Ret

Setcustomvalidity () Method:Sets the Validationmessage property of the input element, which is used to customize the method of the error message.Note: When a custom prompt is set with setcustomvalidity, the validity.customerror becomes true, and checkvalidity () always returns false, resulting in the correct format of the re-entry, or Will prompt you to set the error message.Workaround: Use Obj.validity.patternMismatch to judge, if the input format is correct, will setcustomvalidity empty, so th

JavaScript form Programming: I. How to find form elements: 1.var Oform=document.getelementbyid ("Form1"); 2.var oform=document.forms[form1]//is searched by name; Two. Common features of form fields: Disabled: This property is used to indicate whether a form control is available; Form property: This property returns the form containing the field; Blur (): This method causes the form field to lose focus; Focus (): This method causes the form field to ge

form and process the user-submitted form. Whether the form is generated or processed, the following three processes (tasks) are essential: the first is to determine the type of validation, the validation type values are obtained from the query string when the form is generated, and the hidden fields are read from the form when the form is processed. There are four types of forms authentication that the pro

, -}$ the correct format is: Start with a letter, length in 6-18, only characters, numbers, and underscores can be included. Verify that you contain^%',; =?$\ "and other characters:[^%',; =?$\x22]+Verify Kanji:^[\u4e00-\u9fa5],{0,}$ Verify email address:^\w+[-+.] \w+) *@\w+ ([-.] \w+) *\.\w+ ([-.] \w+) *$ verify InternetURL:^http://([\w-]+\.) +[\w-]+ (/[\w-./?%=]*)? $; ^[a-za-z]+://(w+ (-w+) *) (. ( w+ (-w+) *) * (? s*)? $ verify Phone Number:^ (\ (\d{3,4}\) |\d{3,4}-)? \d{7,8}$:--the correct fo

returndocument.getElementById (ID);8 }9 Ten varemail = $ (' email '); One varresult = $ (' result '); A varSubmit = $ (' Submit '); - -Email.addeventlistener (' KeyUp ',function () { the if(Email.value.indexOf (' @ ') > 0) { -result.innerhtml = ' '; -}Else if(Email.value.indexOf (' @ ') ) { -result.innerhtml = ' Please enter the correct mailbox format, including @ '; + } -},false); + ASubmit.addeventlistener (' click ',function () { at if(Email.value = =NULL|| Email.value = =

The first step:To remove the JS validation from eclipse:Will Windows->preference->java script->validator->errors/warnings->Enable Javascript sematic Validation in front of the hook removed;Step Two:Right click Project--Properties--Builders remove JavaScript Validator front tickIf there is no

most complete and most accurate method: The code is as follows Copy Code function Isnumber (onum){if (!onum) return false;var strp=/^d+ (. d+)? $/;if (!strp.test (Onum)) return false;try{if (parsefloat (onum)!=onum) return false;}catch (ex){return false;}return true;} This JavaScript code is very concise, you can see. The code is as follows Copy Code There is a more stupid

-\\xff]+$",//only acsii characters "^\\d{6}$",//ZIP code "^ (13|15|18) [0-9]{9}$",//Mobile phone "^ (25[0-5]|2[0-4]\\d| [0-1]\\d{2}| [1-9]?\\d] \. (25[0-5]|2[0-4]\\d| [0-1]\\d{2}| [1-9]?\\d] \. (25[0-5]|2[0-4]\\d| [0-1]\\d{2}| [1-9]?\\d] \. (25[0-5]|2[0-4]\\d| [0-1]\\d{2}| [1-9]?\\d) $ ",//IP address "^\\s+$",//Non-empty "(.*)\\. (JPG|BMP|GIF|ICO|PCX|JPEG|TIF|PNG|RAW|TGA) $ ",//Picture "(.*)\\. (rar|zip|7zip|tgz) $ ",//Compressed file "^\\d{4}" (\\-|\\/|\.) \\d{1,2}\\1\\d{1,2}$ ",//Date

Form validation is a user experience optimization that detects invalid data and marks these errors for end users. The following is a display of the browser's own validation features can also be viewed on the mobile side: HTML section: CSS section: fieldset{border:0} . MyForm. form-control{ Display:block; padding:5px; width:100% } . MyForm input:focus:invalid +. form-erro

Check the following items: 1. The validation-config.xml, validation-framework.js, validation-confi.dtd these three files are copied to the root directory of the website, you can first create a directory such as JS storage. 2. In the validation-framework.js 21st line changed to "/webprojectname/JS/", a few diagonal l

Since upgrading from MyEclipse to 7.0, project build is always slow, showing validating those js,html files. No matter how I adjust Windows > Preference > MyEclipse > Validation or manage validation, it's useless.My company's computer is Core2 Duo CPU T7250 @ 2.00GHz CPU, every time the machine is very slow validatingI created a new project and added a Web capabilities to track the. projet file in this proc

For the latest download, visit http://ww2validator.dev.java.net Webwork2 extended validator instructions 1. Download and decompress the file 2. Find jscud_wwvalidators_1 _??. Jar, modify the classpath or copy it to the corresponding path 3. Copy the checkform. js file to your project and then reference There are two methods to reference I: Reference checkform. js directly in your program (note that you need to modify the path) II: Modify/reload the form-close.vm, reference or include checkform

JavaScript limits the input of only numbers, determines the value of Event.keycode, and limits it to only numbers, if not numbers, returns an error, and if it is a number, continue. Let me first show you how to verify that JavaScript is a number another way, by using the following functions: function Isnumber (onum) { if (!onum) return false; var strp=/^/d+ (/./d+) $/; if (!strp.test (Onum)) return false; t

In this process, the. projet file is tracked, and finally the build is discovered where the validation is defined. It seems that my project is based on ExtJS2.0.2 Web project, so I will prompt to open JavaScript capabilities, this feature opened, the benefits do not feel, it will add to the JS file validation.Remove the following section from the. project file, and the item build finally returns to normal.O

User registration information is verified correctlyOne, JavaScript waySecond, regular expression validationApply Regular expression validation: User name 4-16 bit, beginning of letter ; username 4-16 bit, first letter capitalized ; two times the password is the same; phone number One by one and starting with 1 ; date of birth in the The register.jsp script sec

Acknowledgement: http://zuoming.iteye.com/blog/1430925------------------------------------------------If the use of JS plug-ins or frames, may cause eclipse to become very card, such as in the copy, modify the JS code, or in the editing of Java files will build Wordspace, in short, a step by one card, annoying, If I create a new Java file and then delete the hint that eclipse appears:There is a keyword: vilidating, this is the meaning of authentication, the original is because the

Learning from scratch _ JavaScript _ series (8) -- js series (2) (event trigger sequence, text reading, js compiling ajax, input validation, and down menu) (20) event trigger sequence If there are multiple scripts in the document (for example, automatically executed scripts), they are executed in a certain order (in the HTML document ): ① Execute first The output is green, and the background color turns gr

Cases Add the onsubmit attribute to the form or the Add OnClick property of the Submit button, the value is return check (), the check is a JavaScript function, the validation table is single, no call, even if the validation fails will be submitted. In the check function, the validation failure returns false and retur