[Last Call] Learn how to a build a cloud-first strategyRegister Now

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 223
  • Last Modified:

When submitting a form using OnChange how can I pass a variable to determine if the submit button was clicked or the option field was changeed?

My current script submits the form if a certain option field is changed.  The form is submitted back to the same page for processing with PHP.  The problem is that this triggers my form validation code, and puts a message on the screen prompting the user to correct those errors.

I need to be able to tell if the submit button was pressed, or if 'onchange' submitted the form so that the program logic can decide whether or not to validate the data.  How can I do this?
<form id="invoiceInput" name="invoiceInput" method="POST" action="<?php echo $editFormAction; ?>">
  <select name="invoiceMonth" id="invoiceMonth" onChange="JavaScript:form.submit()">
    <option value=""> </option>
    <option value="months">Months</option>
  </select>
</form>

Open in new window

0
CheeserTheAverage
Asked:
CheeserTheAverage
1 Solution
 
hieloCommented:
>>The problem is that this triggers my form validation code
If this validation is taking place on the server, include a hidden field named "trigger" and when select changes, set it to the id of the select. IF you see trigger has the id of the select you know it was set by the select, otherwiser it was sent by the submit:
<form id="invoiceInput" name="invoiceInput" method="POST" action="<?php echo $editFormAction; ?>">
 <input type="hidden" name="trigger" value="submit"/>
  <select name="invoiceMonth" id="invoiceMonth" onChange="trigger.value=this.id; form.submit()">
    <option value=""> </option>
    <option value="months">Months</option>
  </select>
 <input type="submit" value="Submit" onclick="trigger.value=this.value;"/>
</form> 
NOTE: even if the validation is taking place on the browser via javascript, the principle still applies. On your javascript, if you see trigger=="invoiceMonth" then you know it was NOT initiated by the submit.

Open in new window

0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now