On error Redo some TasK

Hi,Here is my question, how do i redo or execute some task's when another
fail

for example , if targetA fail go to onErrorTargetATarget...

 <target name="targetA" >
        ....
    </target>

 <target name="onErrorTargetATarget" >
        ....
<delete ..... />
    </target>

been the main mainTarget


 <target name="mainTarget" depends="targetA, targetB, targetC" >
        ....
    </target>

thks in advance