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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <title>DHTML form validation</title> <meta name="author" content="http://m.ffcwhycf.cn/"/> <meta name="KeyWords" content="DHTML, HTML, Dynamic HTML,CSS, Menu, Menus,Drag and drop, Drag, Drop, Cross-browser, Cross browser, Examples, <a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>script, Free, <a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>scripts, Cascading Style Sheet, Crossbrowser,Alf Magne Kalleland, Batalf, minesweeper"> <meta name="robots" content="follow"> <meta name="googlebot" content="index, follow"> <head> <style type="text/css"> body{   font-family: Trebuchet MS, Lucida Sans Unicode, Arial, sans-serif;  /* Font to use */   background-color:#FFF;   font-size:0.9em; }    /* Style for invalid input */ .invalidInput{   border:1px solid #F00;   padding:1px; } /* Style for valid input */ .validInput{   border:1px solid #FFF;   padding:1px; } </style> <script type="text/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>script"> /************************************************************************************************************ (C) www.dhtmlgoodies.com, February 2006 This is a script from www.dhtmlgoodies.com. You will find this and a lot of other scripts at our website.   Terms of use: You are free to use this script as long as the copyright message is kept intact. However, you may not redistribute, sell or repost it without our permission. Thank you! www.dhtmlgoodies.com Alf Magne Kalleland ************************************************************************************************************/      // Patterns var formValidationMasks = new Array(); formValidationMasks['email'] = //b[A-Z0-9._%-]+@[A-Z0-9.-]+/.[A-Z]{2,4}/b/gi;  // Email formValidationMasks['numeric'] = /^[0-9]+$/gi;  // Numeric formValidationMasks['zip'] = /^[0-9]{5}/-[0-9]{4}$/gi;  // Numeric var formElementArray = new Array(); function validateInput(e,inputObj) {   if(!inputObj)inputObj = this;       var inputValidates = true;      if(formElementArray[inputObj.name]['required'] && inputObj.tagName=='INPUT' && inputObj.value.length==0)inputValidates = false;   if(formElementArray[inputObj.name]['required'] && inputObj.tagName=='SELECT' && inputObj.selectedIndex==0){     inputValidates = false;   }   if(formElementArray[inputObj.name]['mask'] && !inputObj.value.match(formValidationMasks[formElementArray[inputObj.name]['mask']]))inputValidates = false;   if(formElementArray[inputObj.name]['freemask']){     var tmpMask = formElementArray[inputObj.name]['freemask'];     tmpMask = tmpMask.replace(/-/g,'//-');     tmpMask = tmpMask.replace(/S/g,'[A-Z]');     tmpMask = tmpMask.replace(/N/g,'[0-9]');     tmpMask = eval("/^" + tmpMask + "$/gi");     if(!inputObj.value.match(tmpMask))inputValidates = false   }        if(formElementArray[inputObj.name]['regexpPattern']){     var tmpMask = eval(formElementArray[inputObj.name]['regexpPattern']);     if(!inputObj.value.match(tmpMask))inputValidates = false   }   if(!formElementArray[inputObj.name]['required'] && inputObj.value.length==0 && inputObj.tagName=='INPUT')inputValidates = true;         if(inputValidates){     inputObj.parentNode.className='validInput';   }else{     inputObj.parentNode.className='invalidInput'   } } function isFormValid() {   var divs = document.getElementsByTagName('DIV');   for(var no=0;no </head> <body> <form action="" method="post" onsubmit="if(isFormValid())alert('Everything is ok'); else { alert('Something is wrong');return false; }"> <fieldset>   <legend>DHTML form validation</legend>   <table>     <tr>       <td><label for="input1">First name:</label></td>       <td><input name="input1" id="input1" type="text" required="1" value=""></td>       <td>Required = 1</td>     </tr>     <tr>       <td><label for="input2">Last name:</label></td>       <td><input name="input2" id="input2" type="text" required="1" value=""></td>       <td>Required = 1</td>     </tr>     <tr>       <td><label for="email">Email:</label></td>       <td><input name="email" id="email" mask="email" type="text" size="30" required="1" value=""></td>       <td>Required = 1, mask = email</td>     </tr>     <tr>       <td><label for="age">Age:</label></td>       <td><input name="age" id="age" mask="numeric" type="text" required="1" value="" size="3" maxlength="3"></td>       <td>Required = 1, mask = numeric</td>     </tr>     <tr>       <td><label for="code">Code(SSSS-NN):</label></td>       <td><input name="code" id="code" freemask="SSSS-NN" type="text" required="1" value="" size="8" maxlength="7"></td>       <td>Required = 1, freemask = SSSS-NN i.e four letters and two digits</td>     </tr>       <tr>       <td><label for="zipcode">Zip code(NNNNN-NNNN):</label></td>       <td><input name="zipcode" id="zipcode" mask="zip" type="text" required="1" value="" size="11" maxlength="10"></td>       <td>Required = 1, mask = zip</td>     </tr>         <tr>       <td><label for="zipcode">Domain:</label></td>       <td><input name="domain" id="domain" regexpPattern="http://b[A-Z0-9.-]+/.[A-Z]{2,4}/b/gi" size="30" type="text" value=""></td>       <td>regexpPattern="http://b[A-Z0-9.-]+/.[A-Z]{2,4}/b/gi"</td>     </tr>       <tr>       <td>Country</td>       <td><select name="country" required="1">         <option value=""></option>         <option value="Norway">Norway</option>         <option value="Denmark">Denmark</option>         <option value="Sweden">Sweden</option>         <option value="Finland">Finland</option>         <option value="France">France</option>         <option value="United States">United States</option>         <option value="Germany">Germany</option>         </select>       </td>       <td>Required = 1</td>     </tr>     <tr>       <td><input type="submit" value="Send"></td>     </tr>   </table> </fieldset>  </form> </body> </html>

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DHTML form validation

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