function categorySwapImages(a, b)
{
		//alert("inside swap");
		
		// bike category definition

		var bicat = new Array("fullsus", "allterrain", "bmxfox", "roadfox", "lilfox") ;

		var z1 = a.substr(0, 2);
		var z2 = a.substr(3, a.length);
		var z3, z4, zcat, zpic;
		var zflag = false;
		
		for (var i=0; i < bicat.length; i++)
		{
			if (z2 == bicat[i]) zflag = true;
		}
		
		//alert("inside swap");
		if (zflag == true) zcat = "bikes"; else zcat = "accessories";
		
		if (z1 == "on") z3="show-"; else { z3="default-" + zcat ; z2=""; }
		
		z4 = z3 + z2 + ".jpg";
		z4 = "http://www.firefoxbikes.com/wp-content/themes/ffx/images/productsmenu/" + z4;
		
		zpic = new Image(266, 297);
		zpic.src = z4;
		
		//alert(z4);
	    
	    document.images['productsmenushowcase'].src = zpic.src;
}