Tip

Keyword Field Validation On Web

Field validation on the web using javascript is easy for text fields. Keyword
fields are a little more tricky. Here's the code I use to do it. This is a
simple tip but used on almost all my web forms.
You need to get the value of the list first with the following sample function.

<script>
form = document.forms[0];

function GetStateVal()
{
with(window.form.State)//State is the field on //the form we are validating.
{
state=options[selectedIndex].text; //state is a variable.

}
}

function ValidateField()
if(state=="Select a State")//Select a State is //the default value in the State
field
{
alert("Please put a value in the State field");
form.State.focus();
}

else
form.submit();

}
</script>


// Call the GetStateVal() function first and then //the ValidateField()on the
OnClick event of your //submit button.
//I code the submit button with HTML in 4.6 like //the following:

<LEFT><INPUT TYPE = "BUTTON" VALUE = " Submit " onClick = "GetStateVal();
ValidateField()"></LEFT>

// or in R5, create a hotspot button and use the //OnClick javascript event to
call GetStateVal() //and ValidateField() functions.

This was first published in November 2000

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