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Combo box validation..kinda advance

 
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Combo box validation..kinda advance
lilygrace
12 Dec, 2006 - 12:09 AM
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how am I going to validate a combo box if the populating of datas were being generate by the Javascript.

Let's have the code

this is my selection

CODE


<select id="parentCustomer" name="parentCustomer" onChange="returnParentCustomerCode(); getInterCompanyNumber(this, parentCustomers); getNumber(this, parentCustomers); returnInheritedValues();">
                            <option value=""></option>
                          < /select>


but the population is using javascript newArray(). Now my validation is when there's no option selected. That's where I hang... I don't know what to do.

Please help me. Thanks in advance.

This post has been edited by lilygrace: 12 Dec, 2006 - 02:17 AM
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RE: Combo Box Validation..kinda Advance
16 Dec, 2006 - 06:05 AM
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Assuming that “no option selected” means that the option selected has no value, I believe that the following would work: if (!document.getElementById("parentCustomer").value) { … }.

The above code tests the select element for a value. If the value does not exist, then the if statement is true.

Keep in mind that something like <option selected>foo</option> still has a value. The value defaults to the content of the option element when the value attribute is not defined.
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