透明渐变导航栏，怎么让上面字体也跟着改变

用jquery监听页面滚动事件，然后改变字体透明度

解决了！
//字体跟随导航栏标题同时变色！

function toubuyanse() {  
    var a111 = getComputedStyle(document.getElementById("header"));  
    var a222 = a111.background;  
    var a333 = a222.substring(20, 26);  
    if(a333 > 0.6 || a333 == "one re") { daohanglan121.style.color = "rgb(230,69,74)"; }//daohanglan121是标题栏H1自己加的id  
    if(a333 < 0.6 || a333 == "0) non") { daohanglan121.style.color = "white"; }  

    if(a333 == "one re") { document.getElementById("header").style.borderBottom = "1px solid #eee"; } else {  
        document.getElementById("header").style.borderBottom = "0px solid #eee";  
    }  

}  
setInterval("toubuyanse()", 300);