Jpg Index Horny How Would I Add A Z-index Of -1 To This Code?

How would i add a z-index of -1 to this code? - jpg index horny

\\ \\ \\ \\ \\ \\ \\ \\ U0026lt; img style = position: absolute; top: 0px; left: 0px; "src =" http://i34.tinypic.com/2nvywjo.jpg "/>

I just need the AZ index of -1 I do not know where to put it.