function onChangeTab(tab,id){
    var j = 0;
    for(var i=0; i<document.getElementById(tab).childNodes.length; i++){
        if(document.getElementById(tab).childNodes[i].nodeName == "LI"){
            if(!document.getElementById('spn_' + tab + j.toString())){
                j += 1;
                continue;
            }
            document.getElementById(tab).childNodes[i].className = "Tab_R";
            document.getElementById('spn_' + tab + j.toString()).style.display = "none";
            if(j == id){
                document.getElementById(tab).childNodes[i].className = "Tab_On";
                document.getElementById('spn_' + tab + id.toString()).style.display = "";
            }
            j += 1;
        }
    }
}
function preLoadTabImages(){
    MM_preloadImages("/images/tab/tab_10_off_l.gif","/images/tab/tab_10_off_r.gif","/images/tab/tab_20_on_l.gif","/images/tab/tab_20_on_r.gif");
}
function MM_preloadImages(){ //v3.0
    var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
preLoadTabImages();