check if empty

joefawcett · March 9th, 2004, 04:48 AM

Sorry, but if you used the function I showed above the form will NOT submit.

Code:

<html>
<head>
    <title>Testing</title>
    <style>
        #textbox {position:absolute; left:200px};
    </style>
    <script>
    function check(Textbox)
    {
        if(Textbox.value == "")
        {
            alert("Please enter telephone number");    
            //Textbox.select();
            Textbox.focus();
            return false;
        }
        return true;
    }
</script>
</head>
<body onload="document.myform.telephone.focus();">
<form name="myform" onsubmit="return check(document.myform.telephone)">
Telephone No. <input id="textbox" type="text" name="telephone" ><br><br>
<input type="submit" value="Submit"> <br><br>
</form>
</body>
</html>

--

Joe

hosefo81 · March 9th, 2004, 07:39 AM

Oooh!Like this. Just one more questions.

if i have two or more textboxes and i would like to check them all before submitting(form validation).i type
onsubmit="return check(document.myform.telephone);return check(document.myform.name)"> and the first function works well but the second function doesn't function.
Why and how to solve it? i just want one check function to validate them.i believe because of the ; in the onsubmit.

joefawcett · March 9th, 2004, 08:43 AM

Just have one validate function that goes through all inputs that need validating and returns false as soon as it finds one that fails, otherwise return true at the end. There must be hundreds of validating scripts posted on the Web, instead of just thrashing about why not try to understand how it all works?

--

Joe