if (document.images) {
nbar_b1_off  = new Image(); nbar_b1_off.src  = "images/index/index_hnavbar_b1.gif"
nbar_b1_over = new Image(); nbar_b1_over.src = "images/index/index_hnavbar_b1_over.gif"
nbar_b2_off  = new Image(); nbar_b2_off.src  = "images/index/index_hnavbar_b2.gif"
nbar_b2_over = new Image(); nbar_b2_over.src = "images/index/index_hnavbar_b2_over.gif"
nbar_b3_off  = new Image(); nbar_b3_off.src  = "images/index/index_hnavbar_b3.gif"
nbar_b3_over = new Image(); nbar_b3_over.src = "images/index/index_hnavbar_b3_over.gif"
nbar_b4_off  = new Image(); nbar_b4_off.src  = "images/index/index_hnavbar_b4.gif"
nbar_b4_over = new Image(); nbar_b4_over.src = "images/index/index_hnavbar_b4_over.gif"
nbar_b5_off  = new Image(); nbar_b5_off.src  = "images/index/index_hnavbar_b5.gif"
nbar_b5_over = new Image(); nbar_b5_over.src = "images/index/index_hnavbar_b5_over.gif"
}

function turn_off(ImageName) {
	if (document.images != null) {document[ImageName].src = eval(ImageName + "_off.src");}
}

function turn_over(ImageName) {
	if (document.images != null) {document[ImageName].src = eval(ImageName + "_over.src");}
}