I can't get the values to disappear and be blank if the box is unchecked, anyone know what is wrong

[Creenagh]

if (this.getField("check_co3").value=="yes") event.value=(7000+(this.getField("cop_3").value-50000)*15); else event.value = ""

[ls_rbls · Accepted solution]

This has been answered before in a old thread.

Watch how you're spelling "yes" instead of "Yes". 

But, in any case try it like this:

//using not equal to "Off" instead of "Yes" because the default state of the chechbox should be unchecked 

if (this.getField("check_co3").value !=="Off") {
event.value = (7000+(this.getField("cop_3").value-50000)*15);
}
else event.value = "";

I haven't tested this on my end but give it a try ( I may be wrong).

[ls_rbls]

Also, where are you trying to run this script from?

Is it a mouse-up javascript action in the checkbox object or are you using this code as a custom calcution script in the text field where you want to display the  total  ?

[Creenagh]

Its okay the solution came to me as soon as my phone stopped ringing constantly lol you know how it goes... busy work distracts the mind,,, thank you

[ls_rbls]

Ok , you're very welcome