student registration form in html with javascript validation

javascript| Form Validation | Validation of dynamic forms is a common concern in developing Web applications. Sometimes we have to make sure that some items in the form must be filled in, must be numbers, must be a specified number of digits, and so on, we need to use the

javascript| Form Validation | functions check.js js function file /////////////////////////////////////////////////////////////////////////////////**---------------Common validation checkform (oform) for client forms-----------------* Function: Universal validation of all

javascript| Form Validation | functions Whether it is a dynamic site, or other b/s structure of the system, can not be separated from the formForms act as a very important role for the client to submit data to the server.This begs the question, is the data submitted legal? The problem before us is to validate the dataEnsure that the data submitted is legal. So, w

JavaScript form authentication Age JavaScript form validation age, to determine whether an input is in line with age, implemented through regular expressions. Check Age function Isage (str) { var mydate=new Date; var now=mydate.getfullyear (); if (str return false; } return

-\\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

Example: Verify that the input is a number, whether to meet the number of digits, if the error, and a friendly reminder. Effect Chart: This example above contains many commonly used forms validation code, which is shared below: 1, verify the form 2. Verify Nickname 3. Calculate Nickname length 4. Verify that the nickname is present 5, verify the mobile phone number 6, verify the pas

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.

% 50%; Z-index:7; Position:absolute; top:199px; left:200px; }. scale-show {width:12px; height:2px; Background-color: #555; Float:left; }. scale-hidden {width:183px; height:2px; Float:left; } External JS code: (function () {window.onload = Initnumxy (200, 160, 40, 40); var hour_line = document.getElementById ("Hour-line"); var minute_line = document.getElementById ("Minute-line"); var second_line = document.getElementById ("Second-line"); var date_info = docum

Recommended reading: JavaScript form verification length JavaScript Form validation-Submitting a form JavaScript form

JavaScript form Programming: How to find a FORM element: 1.var Oform=document.getelementbyid ("Form1"); 2.var oform=document.forms[form1]//through name lookup; Two. Common features of form fields: Disabled: This property is used to indicate whether a form control is ava

Form validation is used to occur on the server, the client has entered all the necessary data, and then presses the Submit button. If the data of some of the clients that have been entered is either in the wrong form or simply lost, the server sends all the necessary data back to the client and requests the form to be

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 = =

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 vali