Form Validations – JavaScript

Form Validations

Table of Contents

All Small Letters

JavaScript Code

				
					<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Small Letter Validations</title>
</head>

<body>
    <input type="text" id="s1">
    <p id="g1"></p>
    <input type="button" onclick="cc()" value="Submit"> <script type="litespeed/javascript">function cc(){h=0;a=document.getElementById("s1").value;for(j=0;j<=a.length;j++){b=a.charCodeAt(j);if(b>=97&&b<=122){h++}}
if(h==a.length){document.getElementById("g1").innerHTML="All are Small Letters"}else{document.getElementById("g1").innerHTML="No Small Letters"}}</script> <script data-no-optimize="1">!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).LazyLoad=e()}(this,function(){"use strict";function e(){return(e=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n,a=arguments[e];for(n in a)Object.prototype.hasOwnProperty.call(a,n)&&(t[n]=a[n])}return t}).apply(this,arguments)}function i(t){return e({},it,t)}function o(t,e){var n,a="LazyLoad::Initialized",i=new t(e);try{n=new CustomEvent(a,{detail:{instance:i}})}catch(t){(n=document.createEvent("CustomEvent")).initCustomEvent(a,!1,!1,{instance:i})}window.dispatchEvent(n)}function l(t,e){return t.getAttribute(gt+e)}function c(t){return l(t,bt)}function s(t,e){return function(t,e,n){e=gt+e;null!==n?t.setAttribute(e,n):t.removeAttribute(e)}(t,bt,e)}function r(t){return s(t,null),0}function u(t){return null===c(t)}function d(t){return c(t)===vt}function f(t,e,n,a){t&&(void 0===a?void 0===n?t(e):t(e,n):t(e,n,a))}function _(t,e){nt?t.classList.add(e):t.className+=(t.className?" 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</html>
				
			

Complex Password

JavaScript Code

				
					<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Complex Password Validation</title>
</head>

<body>
<p>Checking if Password Contains </p>
<ul>
<li>Minimum one Special Character</li>
<li>Minimum one Lower Case Alphabet</li>
<li>Minimum one Upper Case Alphabet</li>
<li>Minimum one Numerical Value</li>
</ul>
    <input type="text" id="s1">
    <p id="g1"></p>
    <input type="button" onclick="cc()" value="Submit"> <script type="litespeed/javascript">function cc(){a=document.getElementById("s1").value;c=0;d=0;e=0;f=0;for(b=0;b<a.length;b++){g=a.charCodeAt(b);if(g>=97&&g<=122){c=1}else if(g>=65&&g<=90){d=1}else if(g>=48&&g<=57){e=1}else if((g>=33&&g<=47)||(g>=58&&g<=64)||(g>=91&&g<=96)||(g>=123&&g<=126)){f=1}}
if((c==0)||(d==0)||(e==0)||(f==0)){document.getElementById("g1").innerHTML="please enter minimum 1 lower case characte and 1 upper case and 1 special character and i numerical value"}else{document.getElementById("g1").innerHTML="correct"}}</script>  <script data-no-optimize="1">!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).LazyLoad=e()}(this,function(){"use strict";function e(){return(e=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n,a=arguments[e];for(n in a)Object.prototype.hasOwnProperty.call(a,n)&&(t[n]=a[n])}return t}).apply(this,arguments)}function i(t){return e({},it,t)}function o(t,e){var n,a="LazyLoad::Initialized",i=new t(e);try{n=new CustomEvent(a,{detail:{instance:i}})}catch(t){(n=document.createEvent("CustomEvent")).initCustomEvent(a,!1,!1,{instance:i})}window.dispatchEvent(n)}function l(t,e){return t.getAttribute(gt+e)}function c(t){return l(t,bt)}function s(t,e){return function(t,e,n){e=gt+e;null!==n?t.setAttribute(e,n):t.removeAttribute(e)}(t,bt,e)}function r(t){return s(t,null),0}function u(t){return null===c(t)}function d(t){return c(t)===vt}function f(t,e,n,a){t&&(void 0===a?void 0===n?t(e):t(e,n):t(e,n,a))}function _(t,e){nt?t.classList.add(e):t.className+=(t.className?" 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</html>
				
			

Confirm Password

HTML Code

				
					<form id="form1">

<input type="password" name="passward" id="passward" onblur="return formvalipassward()"/>

<input type="password" name="passwardconfirm" id="passwardconfirm" onblur="return formvaliconfirm()"/>

</form>
				
			

JavaScript Code

				
					function formvaliconfirm(){
    var pass=document.form1.passward.value;
    var passconfirm=document.form1.passwardconfirm.value;
    if
        (!(pass==passconfirm)){alert("please enter a correct passward")}
    
}
				
			

Email Validation

HTML Code

				
					<form id="form1">

<input type="text" name="emailid" id="emailid" onblur="return formvaliemail()"/>
				
			

JavaScript Code

				
					function formvaliemail(){
    var email=document.form1.emailid.value;
    var c=email.indexOf("@");
    var d=email.indexOf(".");
    var e=email.lastIndexOf(".");
    var f=email.length;
    var g=e+4;
    var j=c+5;
if
        (email==""){alert("please enter a value")}
        else if(c==-1)
        {alert("please enter a value with @")
            }
    else if(d==-1)
        {alert("please enter a value with .")
            }
else if(e<c)
        {alert("please enter@ before dot(.)")
            }
else if(g>f)
        {alert("please enter3 values after last dot(.)")
            }
            else if(j>e)
        {alert("please enter5 values after@ & last dot(.)")
            }
}
				
			

Math Function in Form Validations

1. length
2. indexOf
3. lastIndexOf
4. charCodeAt
5. charAt
6. Nan

Mobile validation

HTML Code

				
					<input type="text" name="mobile" id="mobile" onblur="return formvalimobile()"/>
				
			

JavaScript Code

				
					function formvalimobile(){
    var mob=document.form1.mobile.value;
if
        (mob==""){alert("please enter a value")}
    else if
        (isNaN(mob)){alert("please enter a numerical value")}

    else if(!(mob.length==10)){alert("please enter a value of 10 digit for India")
    }
    else if(!(mob.charAt(0)==9))
    {alert("please enter a first digit with 9")
        }
       else if(!(mob.charAt(1)==9))
    {alert("please enter a second digit with 9")
        }
}
				
			

Name validation

HTML Code

				
					<input type="text" name="username" id="username" onblur="return formvaliname()"/>
				
			

JavaScript Code

				
					function formvaliname(){
        var nm=document.form1.username.value;
    if
        (nm==""){alert("please enter a value")}
    else if    
    (!(isNaN(nm))){alert("please enter first letter alphabetical")}
else if
        (nm.length<5){alert("please enter minimum 5 letters")}    
    else if
        (nm.indexOf(" ")==-1){alert("please enter sur name")}    
}
				
			

Password Validation

HTML Code

				
					<input type="password" name="passward" id="passward" onblur="return formvalipassward()"/>
				
			

JavaScript Code

				
					function formvalipassward(){
    var pass=document.form1.passward.value;
    if
        (pass==""){alert("please enter a value")}
else if
        (pass.length<8){alert("please enter minimum 8 letters")}
    
}
				
			

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