javascript validation

my problem is following code is my form i want validation and for email field it will check formate useing regularexpressions.

<html>
<script src="combovalidate1.js" type="text/javascript" language="javascript">

</script>
<body>

<form name="form" method="post" onsubmit="return validate1();">
    <table align="center" border="1px" bgcolor="orange" >
        <tr>
            <td>Enter Name</td>
            <td><input type="text" name="name">
            </td>
        </tr>
        <tr>
                <td>email:</td>
                <td><input type="text" name="email"></td>
                </tr>
        <tr>
            <td>Enter Address</td>
            <td><textarea rows="4" cols="4" name="address"></textarea>
            </td>
        </tr>
        <tr>
        <td>Country:</td>
        <td><select name="combo1" onchange="change(this);">
                <option value="0">-select-</option>
                <option value="1">India</option>
                <option value="2">USA</option>
                <option value="3">UK</option>
                </select>
            </td>
        </tr>
<tr> 
         <td>State:</td>
        <td><select name="combo2"></select></td>
</tr>

        <tr>
            <td><input type="submit" value="Submit">
            </td>
            <td><input type="reset">
            </td>
        </tr>
    </table>
</form>
<body>
<html

View Answers

October 19, 2011 at 3:18 PM

<html>
    Email Validation
        <script language = "Javascript">
          function checkEmail() {
            if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(form.email.value)){
            document.write("You have entered valid email.");
            return true;
            }
            return false; 
          }
          function ValidateEmail(){
            var emailID=document.form.email;
            if ((emailID.value==null)||(emailID.value=="")){
            alert("Please Enter your Email ID")
            emailID.focus()
            return false
            }
            if (checkEmail(emailID.value)==false){
            emailID.value=""
            alert("Invalid Email Adderess");
            emailID.focus()
            return false
            }
            return true
          }
        </script>
        <form name="form" method="post" onSubmit="return ValidateEmail()">
        Enter an Email Address : <input type="text" name="email" size="30"><br>
        <input type="submit" name="Submit" value="Submit">
        </form>
</html>

March 9, 2012 at 5:58 PM

validation for name it is useful try it..

<html>
<head>
<script type="text/javascript">
function validateForm()
{
var x=document.forms["myForm"]["fname"].value;
if (x==null || x=="")
  {
  alert("First name must be filled out");
  return false;
  }
}
</script>
</head>

<body>
<form name="myForm" action="demo_form.asp" onsubmit="return validateForm()" method="post">
First name: <input type="text" name="fname">
<input type="submit" value="Submit">
</form>
</body>

</html>
......
for email address it is usefull..Try it..

<html>
<head>
<script type="text/javascript">
function validateForm()
{
var x=document.forms["myForm"]["email"].value;
var atpos=x.indexOf("@");
var dotpos=x.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
  {
  alert("Not a valid e-mail address");
  return false;
  }
}
</script>
</head>

<body>
<form name="myForm" action="demo_form.asp" onsubmit="return validateForm();" method="post">
Email: <input type="text" name="email">
<input type="submit" value="Submit">
</form>
</body>

</html>

do well

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