if (document.images) {

	// header nav tabs images
	var tab1n = new Image()
	tab1n.src = "/images/header/tab_mcc_on.gif"
	var tab1a = new Image()
	tab1a.src = "/images/header/tab_mcc_over.gif"
	
	var tab2n = new Image()
	tab2n.src = "/images/header/tab_core_on.gif"
	var tab2a = new Image()
	tab2a.src = "/images/header/tab_core_over.gif"
	
	var tab3n = new Image()
	tab3n.src = "/images/header/tab_cme_on.gif"
	var tab3a = new Image()
	tab3a.src = "/images/header/tab_cme_over.gif"
	
	var tab4n = new Image()
	tab4n.src = "/images/header/tab_cpe_on.gif"
	var tab4a = new Image()
	tab4a.src = "/images/header/tab_cpe_over.gif"
	
	var tab5n = new Image()
	tab5n.src = "/images/header/tab_pts_on.gif"
	var tab5a = new Image()
	tab5a.src = "/images/header/tab_pts_over.gif"
	
	var tab6n = new Image()
	tab6n.src = "/images/header/tab_pln_on.gif"
	var tab6a = new Image()
	tab6a.src = "/images/header/tab_pln_over.gif"
	
	var tab7n = new Image()
	tab7n.src = "/images/header/tab_sawc_on.jpg"
	var tab7a = new Image()
	tab7a.src = "/images/header/tab_sawc_over.jpg"
	
	
	var roll1n = new Image()
	roll1n.src = "/images/global/more_arrow_blue.gif"
	var roll1a = new Image()
	roll1a.src = "/images/global/more_arrow_grey.gif"
	
	var roll2n = new Image()
	roll2n.src = "/images/global/more_arrow_white.gif"
	var roll2a = new Image()
	roll2a.src = "/images/global/more_arrow_grey.gif"
	
	var roll3n = new Image()
	roll3n.src = "/images/global/more_arrow_blue.gif"
	var roll3a = new Image()
	roll3a.src = "/images/global/more_arrow_grey.gif"
	
	var roll4n = new Image()
	roll4n.src = "/images/global/more_arrow_blue.gif"
	var roll4a = new Image()
	roll4a.src = "/images/global/more_arrow_grey.gif"
	
	  
}

function act(imgName) {
	if (document.images) 
		document[imgName].src = eval(imgName + 'a.src')
}

function inact(imgName) {

	if (document.images)
		document[imgName].src = eval(imgName + 'n.src')
}