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Javascript stopping on error after alert

Posted on 2004-10-27
Medium Priority
Last Modified: 2006-11-17
How can I keep this from reloading the page after the user clicks the alert? I want the user to see an image next to the offending form field, which it is doing, but then immediately reloads the page:

if ( (adults + seniors) < infants ){
alert("The number of infants in a group cannot be \nmore than the number of adults or senior citizens.")
obj = document.getElementById("passInfant");
      spanObj = document.getElementById("errorImage");
      spanObj.innerHTML = "<img src='img/error_star.gif'>";
return false

Many thanks,
Question by:mjacobs2929
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LVL 13

Expert Comment

ID: 12422838
How is this function being called?

You might need to return the value of this function to the actual event that's calling it.
For example:

<blah onclick="return functionName();">

Author Comment

ID: 12422943

The code above is a snippet from a function called checkPassenger() .

checkPassenger() is being called from within another function when the form is submitted:

submit_FC_Form() calls quite a few other functions before finally submitting the form:

function submit_FC_Form(){
 ... other checks ... then...

      if (checkCities() && checkDate() && checkPassenger() && enforceMaxPax() && finalDate() )

 ... more stuff ...

LVL 13

Accepted Solution

cLFlaVA earned 375 total points
ID: 12422977
you say when the form is submitted?

Then may I suggest removing it from the onclick event of the submit button, and instead placing it in the onsubmit event of the form, along with the 'return' statement?

This is how I always validate my forms:

<form ... onsubmit="return submit_FC_Form();">

The reason I say to do this is because submit_FC_Form() will return a value: true or false.  However, regardless of this value, the submission will still occur.  You need to instead return to the onsubmit event the value that submit_FC_Form() returns.  If the function itself returns false (an error was found) then the form will not submit.

Author Comment

ID: 12423143
That works if I use:
<form ... onsubmit="checkPassenger();">

but is still submitting if I use:
<form ... onsubmit="return submit_FC_Form();">

So I guess I need to re-write submit_FC_Form()


Many thanks,


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