This is a generic question
Can I add <apex:commandbutton onclick="if condition? result 1 else result 2">
I would really appreciate a simple example if this is possible.
Thanks in advance
Check like this for If part use below code
<apex:commandbutton onclick="if(true){
alert('this is if part');
}else{
alert('this is else part');
}">
and for else part
<apex:commandbutton onclick="if(false){
alert('this is if part');
}else{
alert('this is else part');
}">
Goto w3school code editor http://www.w3schools.com/tags/tryit.asp?filename=tryhtml_button_test
and run below code
<!DOCTYPE html>
<html>
<body>
<button type="button" onclick="if(true){
alert('this is if part');
}else{
alert('this is else part');
}">Click If!</button>
<button type="button" onclick="if(false){
alert('this is if part');
}else{
alert('this is else part');
}">Click Else!</button>
</body>
</html>