var InternetExplorer = navigator.appName.indexOf("Microsoft") != -1;

about_but=new Image(98,39); about_but.src="img/but_about_on.gif"
about_old=new Image(98,39); about_old.src="img/but_about_off.gif"

products_but=new Image(98,39); products_but.src="img/but_products_on.gif"
products_old=new Image(98,39); products_old.src="img/but_products_off.gif"

service_but=new Image(98,39); service_but.src="img/but_service_on.gif"
service_old=new Image(98,39); service_old.src="img/but_service_off.gif"

order_but=new Image(98,39); order_but.src="img/but_order_on.gif"
order_old=new Image(98,39); order_old.src="img/but_order_off.gif"


function sact(num) {
	document.images[num].src=eval(num+"_but.src");
}

function sdeact(num) {
	document.images[num].src=eval(num+"_old.src");
}