Passing functions from .js to HTML

Question

Would something like this work?

.js

var error = "";

function textBox(checkForBlanks)
{
    if (checkForBlanks == "")
    {
        error(errorMessage);
    }
}

HTML

<!DOCTYPE html>
<html>
<head>
   <script type="text/javascript" src="new.js"></script>
   <script>
function validateAll()
{
   var first = document.billingForm.first.value;
   var errorMessage = "";

   if (first == textBox)
   {
        errorMessage += "Enter name";
   }
   if (errorMessage != "")
   {
        alert(errorMessage); or
            alert(error);
   }
} 
 </script>
</head>
<body>
<form action="http://cswin2k5/echo/default.asp" method="post" name="billingForm">
<p>First Name*:
<input type="textbox" name="first" id="first" onBlur="this.value=trim(this.value)" onkeyup='capitalize(this)'></p>

<p><input type="button" value="Proccess Payment" onClick="return validateAll();"/></p>
   </form>
</body>
</html>

Or something like this? What this is trying to do is check if the text box is empty, that way I can use the same function for all text box. I'm trying to pass this through to HTML for validation.

Peter Bratton · Accepted Answer · 2014-02-11 18:06:39Z

1

Try:

function validateForm()
{
  var x=document.forms["billingForm"]["first"].value;
  if (x==null || x=="")
  {
    alert("Empty field");
    return false;
  }
}

edited Feb 11, 2014 at 18:06

Peter Bratton

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answered Feb 11, 2014 at 17:47

Kostadin

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1 Comment

Winter is Coming Over a year ago

What I need is the js file to do the validating. Hence, or is there a way I can do the validating and send it to the .Js file?

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