Water Elemental Cast macro

[PyroWOW]

I am looking for a Macro that can make my pet attack my Target and if i recast it doesn't reset his cast
Example: I cast on target A pet follows attack and when i cast again he doesn't reset his cast on me.
/cast Frostbolt
/petattack
**Note: This works some times but if hes in middle of an attack it can cause it to reset.

[Imnick]

It's never made him reset for me.
I once set it to /cast waterbolt and that DID make him reset. Are you sure you aren't doing that?

[PyroWOW]

100% sure I mean like i said it rarely does but that can be the Difference from a dead healer and a alive one in pvp

[ComputerNerd]

Try this.
Should cause the pet to attack a target only if it does not currently have one, as in not currently attacking anything.

/cast Frostbolt
/petattack [@pettarget,noexists]