The following HTML script illustrates a simple Javascript validation and submit script that checks inputs on the PC before it is submitted to the server.\u00a0 You might use this method on a web site before submission to the PHP script.\u00a0 The Javascript displays a nice error message on submission if there are any errors and it is quite easy to add more tests when other text boxes are added.<\/p>\n
<!DOCTYPE html PUBLIC “-\/\/W3C\/\/DTD XHTML 1.0 Transitional\/\/EN” “http:\/\/www.w3.org\/TR\/xhtml1\/DTD\/xhtml1-transitional.dtd”>
\n<html xmlns=”http:\/\/www.w3.org\/1999\/xhtml”>
\n<head>
\n<meta http-equiv=”Content-Type” content=”text\/html; charset=utf-8″ \/>
\n<title>Submit a form using Javascript with input validation<\/title><\/p>\n
<script language=”javascript” type=”text\/javascript”>
\n<!–<\/p>\n
\/\/——————————————–
\n\/\/Javascript that will submit the form when all entries are valid
\nfunction button_onclick(frmCreate) {<\/p>\n
var themessage = “Error in entries : “;
\nvar isOK = true;<\/p>\n
if ( frmCreate.txtItem_Number.value == “” ) {
\nthemessage = themessage + “\\n” + “* Enter PayPal item code”;
\nisOK = false;
\n}<\/p>\n
if ( frmCreate.txtItem_Name.value == “” ) {
\nthemessage = themessage + “\\n” + “* Enter PayPal item name”;
\nisOK = false;
\n}<\/p>\n
if ( isOK == false ) {
\nwindow.alert(themessage);
\n} else {
\nfrmCreate.submit(frmCreate);
\n}<\/p>\n
}<\/p>\n
\/\/——————————————–
\n\/\/Checks if the entry is numeric
\nfunction isNumeric(inputVal) {
\nnumeric = true;
\ninputStr = inputVal.toString();
\nfor (var i = 0; i< inputStr.length; i++) {
\nvar oneChar = inputStr.charAt(i);<\/p>\n
if (oneChar < “0” || oneChar > “9”) {
\nreturn false;
\n}<\/p>\n
}<\/p>\n
if (numeric == false) {
\nreturn false; }
\nelse {
\nreturn true; }<\/p>\n
}<\/p>\n
\/\/——————————————–
\nfunction LowerLimit_onblur(frmCreate) {
\nif ( !isNumeric( frmCreate.txtLowerLimit.value ) ) {
\nwindow.alert(“Enter a integer number”);
\nfrmCreate.txtLowerLimit.value = “”;
\nfrmCreate.txtLowerLimit.focus();
\n}
\n}<\/p>\n
\/\/–>
\n<\/script><\/p>\n
<\/head>
\n<body><\/p>\n
<!– START OF MAIN FORM –>
\n<form name=”frmCreate” method=”post” action=”test.html”><\/p>\n
<input type=”button” name=”Create” value=”Create” language=”javascript” onClick=”return button_onclick(frmCreate)” \/><\/p>\n
<br\/><br\/>
\n<table>
\n<tr>
\n<td>
\n<strong>Product Item Reference<\/strong>
\n<\/td><\/p>\n
<td>
\n<input type=”text” name=”txtItem_Number” \/>
\n<\/td>
\n<tr><\/p>\n
<tr>
\n<td>
\n<strong>Product Item Name<\/strong>
\n<\/td><\/p>\n
<td>
\n<input type=”text” name=”txtItem_Name” size=”50″ \/><br\/>
\n<\/td>
\n<\/tr><\/p>\n
<tr>
\n<td>
\n<strong>Enter lower limit<\/strong>
\n<\/td>
\n<td>
\n<input type=”text” name=”txtLowerLimit”\u00a0 value=”5″ size=”3″\u00a0 LANGUAGE=”javascript” onBlur=”return LowerLimit_onblur(frmCreate)” \/>
\n<\/td><\/p>\n
<\/table>
\n<\/form>
\n<!– END OF MAIN FORM –><\/p>\n
<\/body>
\n<\/html><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"
The following HTML script illustrates a simple Javascript validation and submit script that checks inputs on the PC before it is submitted to the server.\u00a0 You might use this method on a web site before submission to the PHP script.\u00a0…<\/span><\/p>\nRead more A simple Javascript Submit and Validation example<\/span> ›<\/span><\/a><\/div>\n<\/p>\n","protected":false},"author":40,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,14],"tags":[],"class_list":["post-883","post","type-post","status-publish","format-standard","hentry","category-general-php","category-site-design"],"yoast_head":"\n
A simple Javascript Submit and Validation example - PHP Web Applications<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.withinweb.com\/info\/a-simple-javascript-submit-and-validation-example\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A simple Javascript Submit and Validation example - PHP Web Applications\" \/>\n<meta property=\"og:description\" content=\"The following HTML script illustrates a simple Javascript validation and submit script that checks inputs on the PC before it is submitted to the server.\u00a0 You might use this method on a web site before submission to the PHP script.\u00a0…Read more A simple Javascript Submit and Validation example ›\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.withinweb.com\/info\/a-simple-javascript-submit-and-validation-example\/\" \/>\n<meta property=\"og:site_name\" content=\"PHP Web Applications\" \/>\n<meta property=\"article:published_time\" content=\"2012-09-17T10:17:01+00:00\" \/>\n<meta name=\"author\" content=\"paulv\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"paulv\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.withinweb.com\\\/info\\\/a-simple-javascript-submit-and-validation-example\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.withinweb.com\\\/info\\\/a-simple-javascript-submit-and-validation-example\\\/\"},\"author\":{\"name\":\"paulv\",\"@id\":\"https:\\\/\\\/www.withinweb.com\\\/info\\\/#\\\/schema\\\/person\\\/04da5531c302d55ffcd777fe81dbb93c\"},\"headline\":\"A simple Javascript Submit and Validation example\",\"datePublished\":\"2012-09-17T10:17:01+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.withinweb.com\\\/info\\\/a-simple-javascript-submit-and-validation-example\\\/\"},\"wordCount\":459,\"commentCount\":0,\"articleSection\":[\"General PHP\",\"Site Design\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.withinweb.com\\\/info\\\/a-simple-javascript-submit-and-validation-example\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.withinweb.com\\\/info\\\/a-simple-javascript-submit-and-validation-example\\\/\",\"url\":\"https:\\\/\\\/www.withinweb.com\\\/info\\\/a-simple-javascript-submit-and-validation-example\\\/\",\"name\":\"A simple Javascript Submit and Validation example - 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