function toggleBox(DivID) // 1 visible, 0 hidden
{
    if(document.layers)	   //NN4+
    {
	   document.layers.tabOver1.visibility = 0 ? "show" : "hide";
	   document.layers.tabOver2.visibility = 0 ? "show" : "hide";
	   document.layers.tabOver3.visibility = 0 ? "show" : "hide";
	   		   
       document.layers[DivID].visibility = 1 ? "show" : "hide";
    }
    else if(document.getElementById)	  //gecko(NN6) + IE 5+
    {
        var obj = document.getElementById('tabOver1');
        obj.style.visibility = 0 ? "visible" : "hidden";
		var obj = document.getElementById('tabOver2');
        obj.style.visibility = 0? "visible" : "hidden";
		var obj = document.getElementById('tabOver3');
        obj.style.visibility = 0 ? "visible" : "hidden";
		
		var obj = document.getElementById(DivID);
        obj.style.visibility = 1 ? "visible" : "hidden";
    }
    else if(document.all)	// IE 4
    {
        document.all.tabOver1.style.visibility = 0 ? "visible" : "hidden";
		document.all.tabOver2.style.visibility = 0 ? "visible" : "hidden";
		document.all.tabOver3.style.visibility = 0 ? "visible" : "hidden";
		
		document.all[DivID].style.visibility = 1 ? "visible" : "hidden";
    }
}