question about pdf loading

I am making a SWF with a menu to load a list of PDFs. My code is giving me issues. I have two PDFs in the list and when I click each they both load the same thing even though they are calling to different files and they are both different buttons with different instances. Here is my code:

hammer_crusher_load.addEventListener(MouseEvent.CLICK, goPDF);

crush_retro_load.addEventListener(MouseEvent.CLICK, goPDF);

function goPDF(event:MouseEvent):void

{

    var url:String = "Brochures/Crushing/EVHammerImpactCrusherlowres.pdf";

    var url:String = "Brochures/Crushing/EVcrusherretrofit.pdf";

    var request:URLRequest = new URLRequest(url);

    navigateToURL(request);

}

When I test the SWF I get this error:

Scene 1, Layer 'Actions', Frame 10, Line 7 Warning 3596: Duplicate variable definition.

I dont know how else to write this. If someone could show me what I am doing wrong I would appreciate it. Thanks.

the second bit of code i have tried that still wont work right is:

hammer_crusher_load.addEventListener(MouseEvent.CLICK, goPDF);

function goPDF(event:MouseEvent):void

{

    var url:String = "Brochures/Crushing/EVHammerImpactCrusherlowres.pdf";

    var request:URLRequest = new URLRequest(url);

    navigateToURL(request);

}

crush_retro_load.addEventListener(MouseEvent.CLICK, goPDF);

{

    var url:String = "Brochures/Crushing/EVcrusherretrofit.pdf";

    var request:URLRequest = new URLRequest(url);

    navigateToURL(request);

}