problem in postal code validaition

[Nomvula]

hi guys could you please help me I've done my script checking for input data but now I have a problem including checking for number validation in Postal Code field: here's my code and on the Postal code instead of checking for empty field I need to change it to validate number only:

function isformvalid()

{

//Load Vars from form

txtFirst_Name = document.frmValidate.txtFirst_Name.value;

//alert(txtFirst_Name);

txtSurname= document.frmValidate.txtSurname.value;

txtEmail= document.frmValidate.txtEmail.value;

txtPostal_Code= document.frmValidate.txtPostal_Code.value;

 

msgHeader = "The form contains the following errors:\n\n";

errMsg = "";

numErrors = 0;

 

 

var focusElement;

//First Name

if(txtFirst_Name==""){

errMsg += "Your first name is required,\n";

if(focusElement == null)

focusElement = document.frmValidate.txtFirst_Name;

document.getElementBy("firstNameError").className= "show";

numErrors = numErrors + 1;

} else {

document.getElementBy("firstNameError").className= "hide";

}

 

//Surname

if(txtSurname==""){

//alert("here");

errMsg += "Your Surname is required,\n";

if(focusElement == null) focusElement=document.frmValidate.txtSurname;

document.getElementById("surnameError").className = "show";

numErrors = numErrors + 1;

} else {

document.getElementById("surnameError").className = "hide";

}

 

//Email

if(txtEmail==""){

//alert("here");

errMsg += "Your Email is required,\n";

if(focusElement == null) focusElement = document.frmValidate.txtEmail;

document.getElementById("EmailError").className = "show";

numErrors = numErrors + 1;

} else {

document.getElementById("EmailError").className = "hide";

}

 

//Postal Code

if(txtPostal_Code==""){

errMsg += "Enter Postal Code is required.\n";

if(focusElement == null) focusElement = document.frmValidate.txtPostal_Code;

document.getElementById("CodeError").className = "show";

numErrors = numErrors + 1;

} else {

document.getElementById("CodeError").className = "hide";

}

 

 

//Check to see if we had any errors

if(numErrors>0){

alert(msgHeader + errMsg);

if(focusElement)

focusElement.focus();

return false;

}else{

return true;

}

}

 

-->

</script>

[BlueJay924]

i'm not sure if this helps you but i normally use this to check for numbers:

 

If ZipcodeBox.Text = "" Or (oRegex.IsMatch(ZipcodeBox.Text, "\d{5}") And ZipcodeBox.Text.Length = 5) Then

'then this is a valid zipcode

else

'not valid

end if

 

i've only done this for a 5 digit zip code. accepts only numbers.

[Volte]

What language is this? This looks like some form of JavaScript to me.

[Nomvula]

thanks, but I need to check for four digits and it must be only numbers

[BlueJay924]

if you're using vb.net it should work. just change where is 5 to 4. and it does check to make sure that the characters entered are numbers.