Javascript Form Validation

Dibawah ini sample script yang sudah dimodif untuk validasi email dan nomor telepon (+62-21 5555555)

<script language=”javascript”

type=”text/javascript”>

<!– hide script from older browsers

function IsNumeric(strString)

//  check for valid numeric strings

{

var strValidChars = “0123456789.-+”;

var strChar;

var blnResult = true;

if (strString.length == 0) return false;

//  test strString consists of valid characters listed above

for (i = 0; i < strString.length && blnResult == true; i++)

{

strChar = strString.charAt(i);

if (strValidChars.indexOf(strChar) == -1)

{

blnResult = false;

}

}

return blnResult;

}

function validateForm(contact)

{

if(“”==document.forms.contact.name.value)

{

alert(“Please enter your name.”);

document.forms.contact.name.focus();

return false;

}

var phone = document.forms.contact.phone.value;

if(“”==phone)

{

alert(“Please enter your phone.”);

document.forms.contact.phone.focus();

return false;

}else if(!IsNumeric(phone)){

alert(“Please enter your phone all in numeric e.g. +62-21-5555555.”);

document.forms.contact.phone.focus();

return false;

}

if(“”==document.forms.contact.email.value)

{

alert(“Please enter your email.”);

document.forms.contact.email.focus();

return false;

}else if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(document.forms.contact.email.value)){}

else{

alert(“Please enter your correct email address.”);

document.forms.contact.email.focus();

return false;

}

document.forms.contact.submit();

}

–>

</script>

<script language=”javascript”   type=”text/javascript”>
<!– hide script from older browsersfunction IsNumeric(strString)   //  check for valid numeric strings    {   var strValidChars = “0123456789.-+”;   var strChar;   var blnResult = true;
if (strString.length == 0) return false;
//  test strString consists of valid characters listed above   for (i = 0; i < strString.length && blnResult == true; i++)      {      strChar = strString.charAt(i);      if (strValidChars.indexOf(strChar) == -1)         {         blnResult = false;         }      }   return blnResult;   }

function validateForm(contact){
if(“”==document.forms.contact.name.value){alert(“Please enter your name.”);document.forms.contact.name.focus();
return false;}
var phone = document.forms.contact.phone.value;
if(“”==phone){alert(“Please enter your phone.”);document.forms.contact.phone.focus();
return false;}else if(!IsNumeric(phone)){ alert(“Please enter your phone all in numeric e.g. +62-21-5555555.”);document.forms.contact.phone.focus();
return false; }
if(“”==document.forms.contact.email.value){alert(“Please enter your email.”);document.forms.contact.email.focus();
return false;}else if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(document.forms.contact.email.value)){}else{ alert(“Please enter your correct email address.”);document.forms.contact.email.focus();
return false; }
document.forms.contact.submit();} –></script>

Semoga bermanfaat.

—

source: pbdr.com