function show_layer(id) {
    if (is_nav6up || is_ie5up) {
	layerObj = document.getElementById(id);
	layerObj.style.visibility="visible";
    } else {
	if (is_nav4up) {
	    document.layers[id].visibility = "show";
	} else {
	    if (is_ie4up) {
		document.all[id].style.visibility = "visible";
	    }
	}
    }
}
function hide_layer(id) {
    if (is_nav6up || is_ie5up) {
	layerObj = document.getElementById(id);
	layerObj.style.visibility="hidden";
    } else {
	if (is_nav4up) {
	  document.layers[id].visibility = "hide";
	} else {
	    if (is_ie4up) {
		document.all[id].style.visibility = "hidden";
	    }
	}
    }
}
function img_on(navid,layerid) {

    imgid = navid;
    onimg = eval (navid+"_on.src");

    swap_img(imgid,onimg,layerid);
}
function img_off(navid,layerid) {
    
    imgid = navid;
    offimg = eval(navid+"_off.src");
    
    swap_img(imgid,offimg,layerid);
}
function swap_img(id,img,layerid) {
    if (is_nav6up || is_ie5up) {
	layerObj = document.getElementById(id);
	layerObj.src=img;
    }  else {
	if (is_nav4) {
	    if (layerid == '' || layerid == undefined) {
		document.images[id].src = img;
	    } else {
		document.layers[layerid].document.images[id].src = img;
	    }
	} else {
	    if (is_ie4up) {
		document.images[id].src = img;
	    }
	}
    }
    window.status='Twiflex Bring You Advanced Braking Technology';
}

function SetDropDown(obj,value) {
    var found = false;
    for (var i=0; i < obj.options.length && !found; i++) {
	if (obj.options[i].value == value) {
	    obj.selectedIndex = i;
	    found = true;
	}
    }
}
function SetRadioButton(obj, value) {
    var found = false;
    for (var i=0; i < obj.length && !found; i++) {
	if (obj[i].value == value) {
	    obj[i].checked = true;
	    found = true;
	}
    }
}
function move_layer_to(layerid,x,y) {
    
    if (is_ie4up) {
	document.all[layerid].style.pixelLeft = x;
	document.all[layerid].style.pixelTop = y;
    } else {
	document.layers[layerid].moveTo(x,y);
    }
}
function popup_window(href_location) {

   newWin=window.open(href_location,'external_window','height=400,width=600,menubar,resizable,scrollbars,location');
   newWin.focus();
}