Javascript Form Field Validation

Javascript Form Field Validation script is used to validate the user input fields on website.

Features

  • Helps to avoid duplicate entries and spams.
  • Most useful for user registration form.
  • Prevent wrong user inputs in specific fields.
  • Efficient way to validate user inputs from client side.

Preview

Name
Gender
Email
Username
Password
Confirm password
Ph_no

Downloads

Javascript


<script type="text/javascript">
function isAlphapet()
{
var alphaExp = /^[a-zA-Z]+$/;
var namee=document.field.name.value;
var nalt=document.getElementById('name1');
if(namee!="")
{
if(!namee.match(alphaExp))
{
nalt.innerHTML="<font color='red'> Invalid Characters </font>";
document.field.name.focus();
document.field.name.value="";
return false; }
else
{
nalt.innerHTML="";
return true;
}
}
else
if(namee.length==0)
{
nalt.innerHTML="<font color='red'> Invalid Name</font>";
document.getElementById('name').focus();
return false;
}}function isAlphaNumeric(){
var alphaExp = /^[0-9 a-zA-Z]+$/;
var usernam=document.field.user.value;
var ualt=document.getElementById('user1');
if(!usernam.match(alphaExp) && (usernam!=""))
{
document.field.user.focus();
ualt.innerHTML="<font color='red'> Invalid Username </font>";
return false;
}
else
{ualt.innerHTML="";
return true;
} }function emailvalid()
{var emal=document.field.email.value;var ealt=document.getElementById('email1');if(emal!=""){var emailExp = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([com\co\.\in])+$/;if(!emal.match(emailExp)){document.field.email.focus();ealt.innerHTML="<font color='red'> Invalid Email id </font>";
return false; }else{
ealt.innerHTML="";document.getElementById('email').focus();return true;}} else if(emal.length==0)
{ealt.innerHTML="<font color='red'> Invalid Email id</font>";
return false;
}
}

function isNumeric()
{var elem=document.field.ph_no.value;var nalt=document.getElementById('phno1');
if(elem!="")
{var numericExpression = /^[0-9]+$/;if(elem.match(numericExpression)){nalt.innerHTML="";return true;}else{nalt.innerHTML="<font color='red'> Numeric Values Only</font>";document.field.ph_no.focus();
document.field.ph_no.value="";return false;}}else if(elem.length==0)
{nalt.innerHTML="<font color='red'> Numeric Values Only</font>";document.field.ph_no.focus();;return false;}
}
function chkform()
{var nam=document.getElementById('name');var selct=document.getElementById('gender');var userlen=document.getElementById('user');var phno=document.getElementById('ph_no');var pawd=document.getElementById('pwd');
var pawdcon=document.getElementById('pwd_con');
if(isAlphapet())
{
if(madeselection()){if(emailvalid()){
if(isAlphaNumeric()){ if(charlen()){if(password){ if(pass()){if(isNumeric()){
if((userlen.value.length!=0) && (phno.value.length!=0)&& (pawd.value.length!=0) && (pawdcon.value.length!=0) && (nam.value.length!=0)){var id=document.getElementById('fld');id.innerHTML="<center><h1><font color=green>Welcome to HScripts.com</h1><br><h4><font color=red>Submission Successful!</font></h4></center>";}}}}}}} }}else{return false;}
}function madeselection()
{
var selct=document.getElementById('gender');var salt=document.getElementById('opt1');
if(selct.value=="Please Choose")//|| (userlen.value.length==0) || (phno.value.length==0)|| (pawd.value.length==0) || (pawdcon.value.length==0) || (nam.value.length==0)){salt.innerHTML="<font color='red'> Choose Gender</font>";selct.focus();return false;}else{ return true;}
}

function
charlen()
{var userid=document.getElementById('user');var uu=userid.value;var chrlen=uu.length;
var ualt=document.getElementById('user1');if(uu!=""){if(chrlen<5){document.field.user.focus();ualt.innerHTML="<font color='red'> Username Too Short</font>";return false;}else {ualt.innerHTML="";return true;}}else if(chrlen==0)
{ualt.innerHTML="<font color='red'> Invalid
Username</font>";userid.focus();return false;}
}
function password()
{var pawd1=document.getElementById('pwd');var palt=document.getElementById('pwd1');
if(pawd1.value.length==0){palt.innerHTML="<font color='red'> Invalid PassWord</font>";document.getElementById('pwd').focus();return false;}
else{palt.innerHTML="";return true;}
}
function pass()
{var pawd1=document.getElementById('pwd');var pawdcon2=document.getElementById('pwd_con');var palt=document.getElementById('pwd1');var pcalt=document.getElementById('pwdcon1');
if(pawdcon2.value.length==0)
{pcalt.innerHTML="<font color='red'> Invalid Password Cofirm </font>";pawdcon.focus();return false;}
else if(pawd1.value!=pawdcon2.value){pcalt.innerHTML="";palt.innerHTML="<font color='red'> Password Mismatch</font>";return false;}else{palt.innerHTML="";pcalt.innerHTML="";return true;}
}
function slctemp()
{
var saalt=document.getElementById('opt1');
saalt.innerHTML="";
}
</script>


HTML Code


<style type="text/css">
#header
{
width:500px;
height:70px;
margin:0 auto;
background:url(https://www.hscripts.com/scripts/JavaScript/hfieldvalidation/images/header_bg.jpg) 0 0 no-repeat;
padding:0 0 0 0 px;
}
</style>
<table
align=center cellspacing=0 cellpadding=0 style="font-family: Monaco, Verdana, Sans-serif; font-size: 12px;background-color: #f9f9f9;border: 1px solid #D0D0D0;color: #002166;width:45%;" >
<tr><td><div id="header"><div align=center style='padding-top:15px;font-size:15px;color:orange;font-weight:bold;'>Field Validation Form</div></div></td></tr><tr><td>
<form name="field">
<div id='fld'>
<table
cellspacing=2 cellpadding=2 style="font-family: Monaco, Verdana, Sans-serif; font-size: 12px;background-color: #f9f9f9;border: 0px solid #D0D0D0;color: #002166;padding-left:10px;width:100%;" >
<tr><td width='31%'>Name</td><td><input type="text" name="name" id="name"
onBlur="isAlphapet()"><span id=name1></span></td></tr>
<tr><td>Gender</td><td><select id="gender" onChange="slctemp()" onBlur="madeselection()" style='width:135px;' ><option>Please Choose</option><option>Male</option><option>Female</option></select><span id=opt1></span></td></tr>
<tr><td>Email</td><td><input type="text" name="email" id="email" onBlur="emailvalid()" ><span id=email1></span></td></tr>
<tr><td>Username</td><td><input type="text" name="user" id="user"
onBlur="charlen(this.id)" maxlength=10 onKeyup="isAlphaNumeric()" ><span id=user1></span></td></tr>
<tr><td>Password</td><td><input type="password" name="pwd" id="pwd" onBlur='password()' ><span id=pwd1></span></td></tr>
<tr><td>Confirm password</i>
</td><td><input type="password" name="pwd_con" id="pwd_con" onBlur='pass()'><span id=pwdcon1></span></td></tr>
<tr><td>Ph_no</td><td><input type="text" name="ph_no" id="ph_no" onKeyup="isNumeric()"
maxlength=10 ><span id=phno1></span></td></tr>
<tr><td colspan=2 align=center> <input id="x" type="button" value="Validate Form"
onClick="chkform()" ></tr></td>
</table></div></form></td></tr></table>
<div style="font-size: 10px;color: #dadada;" id="dumdiv" align=center>
<a href="https://www.hscripts.com" id="dum" style="text-decoration:none;color: #dadada;">h</a></div>

  • Get free version without ©copyright link for just $10/-
  • For customization of this script or any script development, mail to support@hscripts.com

Usage

  • Copy and paste the script into your file.
  • Modify the form fields according to your website.

License

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