Checking select box before processing form 1

rmagan · Dec 29, 2003

I have a form that uses a select box (multiple). When the users hits the 'Go' button, I need to make sure that the user selected at least 1 value from the select box. If they did, I need to process my form, otherwise display alert and cancel.

<html>
<head>
<html>
<head>
<title>Student Schedule</title>
<script type="text/javascript">
function fillFields(form){
var a = form.p_sched_value.value;
}
</script>
</head>
<form name="maint_student_schedule" onSubmit="fillFields(this)" action="stars3.star_portal.process_student_schedule" method="post">
<table width="100%" border="0" cellspacing=0 cellpadding=2 id="student_schedule">
<TBODY>
<table ALIGN="LEFT"><br><tr>
<td ALIGN="RIGHT"> <font CLASS="PortletText1">
<select name="p_sched_value" id="sched_choice1" SIZE="3" MULTIPLE>
<option value=~~~~~~~~~~~~~01>01  &nbsp (07:59-08:44)
<option value=~~~~~~~~~~~~~02>02  &nbsp (08:45-09:25)
<option value=~~~~~~~~~~~~~03>03  &nbsp (09:25-10:10)
</select>
</td>
<td ALIGN="CENTER"><input type="submit" name="p_action" value="Go">
</tr>
</table>
</tbody>
</form>
</table>

PatrickIRL · Dec 29, 2003

Hi,

Instead of <input type = "submit" ... use <input type="button" and attach an onclick event that checks the selectedIndex of your dropdown list eg.

Code:

<td ALIGN=&quot;CENTER&quot;><input type=&quot;button&quot; name=&quot;p_action&quot; value=&quot;Go&quot; onCLick=&quot;return CheckList();&quot;>

the CheckList function is defined as follows ...

Code:

<script type=&quot;text/javascript&quot;>
  function CheckList(){

if(maint_student_schedule.sched_choice1.selectedIndex== -1){
  alert(&quot;Please select an option&quot;);
  return false;
  }
  else{
    maint_student_schedule.submit();
  }
}
</script>

Patrick

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Checking select box before processing form 1

rmagan

Programmer

PatrickIRL

Programmer

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