function msover(btn_name){  
    document.images[btn_name].src=document.images[btn_name].src.substring(0, document.images[btn_name].src.length-7) + "over.gif"
}

function msout(btn_name){
    document.images[btn_name].src=document.images[btn_name].src.substring(0, document.images[btn_name].src.length-8) + "off.gif"
}

/*SiteMap*/
function showArrow(imgName){
	eval("document."+imgName).src="../../media/sign_1.gif";
}

function hideArrow(imgName){
	eval("document."+imgName).src="../../media/space.gif";
}