I'm dying my hair but should I dye my eyebrows to?

I'm Japanese and I want a lighter brown shade of hair and I have a Dark Brown hair color.I'm dying my hair a light amber brown color. If you need to know what the box looks like or whatever then go here a href="http://www.google.com/imgres?imgurl=http://www.lorealparis.ca/img/l10n/products/305x262/Hco11_27.jpg&imgrefurl=http://www.lorealparis.ca/haircolour/all-over-colour/superior-preference/65-light-amber-brown.aspx&usg=__jV9WXv3Fw5-XRTVwWtSW0y0KZzI=&h=262&w=305&sz=43&hl=en&start=0&sig2=D4SuEzr-7u8UH8fpoqgo3A&zoom=1&tbnid=j9f9s1Da7izNkM:&tbnh=120&tbnw=138&ei=VqSKTay7J6yP0QGo1smnDg&prev=/images%3Fq%3Dlight%2Bamber%2Bbrown%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26sa%3DN%26rls%3Dorg.mozilla:en-US:official%26biw%3D1280%26bih%3D584%26tbs%3Disch:1&um=1&itbs=1&iact=hc&vpx=380&vpy=248&dur=403&hovh=208&hovw=242&tx=181&ty=129&oei=VqSKTay7J6yP0QGo1smnDg&page=1&ndsp=24&ved=1t:429,r:10,s:0" rel="nofollow"http://www.google.com/imgres?imgurl=http…/a And my friend told me to dye my eyebrows along with my hair so it doesnt look weird. But I don't know how to do it. How much amount? and do you think its a good idea?