onBeforeChange

fires before the data in some input changed ( by user actions )

name	string	item name
old_val	mixed	an existing value
new_val	mixed	a new value

Example

myForm.attachEvent("onBeforeChange", function (name, old_value, new_value){
    //your code here
return true;
});

returning "false" from the event handler will cancel the value changing (the onChange event won't be called after this)

Back to top