Ticking a checkbox changes the value of a field in a form

[arobbo]

hi , afraid my javascript is quite basic (when i was at uni many years ago it appears i didn't pay enough attention )

i'm trying to do something very simple but getting no where fast ...

basically if a check box is ticked i want it to change the value to 0.5 and if it is unticked to run a function ... so far my code looks like this



<script language="javascript">

function checkBox() {

if (document.form.halfDay.checked) {
(document.form.lenghtOfAbsence.value)=="0.5";
}

}

</script>

which is initiated by the following in the form


<input type =checkbox name = halfDay onChange="checkBox()">

can anyone help me please

 

[LFI]

Change your onChange event to an onClick event and, in your function, change (document.form.lenghtOfAbsence.value)=="0.5"; to (document.form.lenghtOfAbsence.value)[highlight]=[/highlight]"0.5";.

The double-equals sign (==) is to compare for equality. The singal equals sign (=) is for assignment of values.

'hope that helps.

--Dave

 

[arobbo]

you little beauty

much appreciated

 

[LFI]

Ooh! Always nice to get a compliment! I'll annoy my officemates by whistling the rest of the morning!

Have a great day!

--Dave

 

[theniteowl]

arobbo
This line: (document.form.lenghtOfAbsence.value)=="0.5";
is comparing the value of that field not setting it.
== is for comparing like: if (this == that).
= is for assigment like: this = that;

Try your function like this:
function checkBox() {

if (document.form.halfDay.checked) {
document.form.lenghtOfAbsence.value = "0.5";
}
else
someotherfunction();
}


Paranoid? ME?? WHO WANTS TO KNOW????

 

[theniteowl]

Damn, did it again. Stop to answer WORK related questions and my post goes in late.


Paranoid? ME?? WHO WANTS TO KNOW????