ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false

catalog1_off				= new Image();
catalog1_off.src			= "images/dhtml/products/catalog1_off.jpg";
catalog1_on					= new Image();
catalog1_on.src				= "images/dhtml/products/catalog1_on.jpg";

catalog2_off				= new Image();
catalog2_off.src			= "images/dhtml/products/catalog2_off.jpg";
catalog2_on					= new Image();
catalog2_on.src				= "images/dhtml/products/catalog2_on.jpg";

catalog3_off				= new Image();
catalog3_off.src			= "images/dhtml/products/catalog3_off.jpg";
catalog3_on					= new Image();
catalog3_on.src				= "images/dhtml/products/catalog3_on.jpg";

catalog4_off				= new Image();
catalog4_off.src			= "images/dhtml/products/catalog4_off.jpg";
catalog4_on					= new Image();
catalog4_on.src				= "images/dhtml/products/catalog4_on.jpg";

catalog5_off				= new Image();
catalog5_off.src			= "images/dhtml/products/catalog5_off.jpg";
catalog5_on					= new Image();
catalog5_on.src				= "images/dhtml/products/catalog5_on.jpg";

catalog6_off				= new Image();
catalog6_off.src			= "images/dhtml/products/catalog6_off.jpg";
catalog6_on					= new Image();
catalog6_on.src				= "images/dhtml/products/catalog6_on.jpg";

catalog7_off				= new Image();
catalog7_off.src			= "images/dhtml/products/catalog7_off.jpg";
catalog7_on					= new Image();
catalog7_on.src				= "images/dhtml/products/catalog7_on.jpg";

catalog8_off				= new Image();
catalog8_off.src			= "images/dhtml/products/catalog8_off.jpg";
catalog8_on					= new Image();
catalog8_on.src				= "images/dhtml/products/catalog8_on.jpg";

catalog9_off				= new Image();
catalog9_off.src			= "images/dhtml/products/catalog9_off.jpg";
catalog9_on					= new Image();
catalog9_on.src				= "images/dhtml/products/catalog9_on.jpg";

catalog10_off				= new Image();
catalog10_off.src			= "images/dhtml/products/catalog10_off.jpg";
catalog10_on				= new Image();
catalog10_on.src			= "images/dhtml/products/catalog10_on.jpg";

function img_act(imgName) 
{
        imgOn = eval(imgName + "_on.src");
        document [imgName].src = imgOn;
}

function img_inact(imgName) 
{
        imgOff = eval(imgName + "_off.src");
        document [imgName].src = imgOff;
}