javascript如何改字体颜色

<script language="JavaScript">
<!--
var caution = false
function setCookie(name, value, expires, path, domain, secure) {
        var curCookie = name + "=" + escape(value) +
                ((expires) ? "; expires=" + expires.toGMTString() : "") +
                ((path) ? "; path=" + path : "") +
                ((domain) ? "; domain=" + domain : "") +
                ((secure) ? "; secure" : "")
        if (!caution || (name + "=" + escape(value)).length <= 4000)
                document.cookie = curCookie
        else
                if (confirm("Cookie exceeds 4KB and will be cut!"))
                        document.cookie = curCookie
}
function getCookie(name) {
        var prefix = name + "="
        var cookieStartIndex = document.cookie.indexOf(prefix)
        if (cookieStartIndex == -1)
                return null
        var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length)
        if (cookieEndIndex == -1)
                cookieEndIndex = document.cookie.length
        return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex))
}
function deleteCookie(name, path, domain) {
        if (getCookie(name)) {
                document.cookie = name + "=" +
                ((path) ? "; path=" + path : "") +
                ((domain) ? "; domain=" + domain : "") +
                "; expires=Thu, 01-Jan-70 00:00:01 GMT"
        }
}
function fixDate(date) {
        var base = new Date(0)
        var skew = base.getTime()
        if (skew > 0)
                date.setTime(date.getTime() - skew)
}
var now = new Date()
fixDate(now)
now.setTime(now.getTime() + 365 * 24 * 60 * 60 * 1000)
var visits = getCookie("counter")
if (!visits)
        visits = 1
else
        visits = parseInt(visits) + 1
setCookie("counter", visits, now)
document.write("漫步的鱼欢迎您的第" + visits + "次光临！")
// -->
</script>

请问上面的代码怎么把“漫步的鱼欢迎您的第N次光临”改成红色，还是菜鸟，希望知道的帮帮忙