function vd(obj){
    if(document.getElementById(obj).style.visibility=='hidden') {
        document.getElementById(obj).style.visibility='';
    } else {
        document.getElementById(obj).style.visibility='hidden';
    }
}

function dd(obj){
    if(document.getElementById(obj).style.display=='none') {
        document.getElementById(obj).style.display='';
    } else {
        document.getElementById(obj).style.display='none';
    }
}

function alldisp(num) {
    for(i=1;i<=num;i++) {
        if(i<10) { obj='t0'+i+'r' } else  { obj='t'+i+'r' } 
        document.getElementById(obj).style.visibility='';
        if(i<10) { obj='t0'+i+'a' } else  { obj='t'+i+'a' } 
        document.getElementById(obj).style.visibility='';
    }
}

function allhide(num) {
    for(i=1;i<=num;i++) {
        if(i<10) { obj='t0'+i+'r' } else  { obj='t'+i+'r' } 
        document.getElementById(obj).style.visibility='hidden';
        if(i<10) { obj='t0'+i+'a' } else  { obj='t'+i+'a' } 
        document.getElementById(obj).style.visibility='hidden';
    }
}

function allroman(num) {
    for(i=1;i<=num;i++) {
        if(i<10) { obj='t0'+i+'r' } else  { obj='t'+i+'r' } 
        document.getElementById(obj).style.visibility='';
        if(i<10) { obj='t0'+i+'a' } else  { obj='t'+i+'a' } 
        document.getElementById(obj).style.visibility='hidden';
    }
}

function alldispa(num) {
    for(i=1;i<=num;i++) {
        if(i<10) { obj='a0'+i } else  { obj='a'+i } 
        document.getElementById(obj).style.visibility='';
    }
}

function allhidea(num) {
    for(i=1;i<=num;i++) {
        if(i<10) { obj='a0'+i } else  { obj='a'+i } 
        document.getElementById(obj).style.visibility='hidden';
    }
}

function newImage(year,month,day,limit,giffile){
    update = new Date(year,month-1,day);
    now = new Date();
    period = (now-update)/(1000*60*60*24);
    if(period <=limit){
        document.write("<IMG SRC='"+giffile+"'>");
    }
}

function alldispty(num) {
    document.getElementById('roman').style.display='';
    document.getElementById('jpn').style.display='';
    alldispa(num);
}

function allhidety(num) {
    document.getElementById('roman').style.display='none';
    document.getElementById('jpn').style.display='none';
    allhidea(num);
}

function pu(cHtml,cTitle,nWidth,nHeight){
	cOption = "width=" + nWidth + ",height=" + nHeight;
	nwin = window.open(cHtml, cTitle, cOption);
	return false; 
}

function alldispb(num) {
    for(i=1;i<=num;i++) {
        if(i<10) { obj='a0'+i } else  { obj='a'+i } 
        document.getElementById(obj).style.visibility='';
    }
}

function allhideb(num) {
    for(i=1;i<=num;i++) {
        if(i<10) { obj='a0'+i } else  { obj='a'+i } 
        document.getElementById(obj).style.visibility='hidden';
    }
}

function navichapter() {
    document.location = document.getElementById("navichapter").value + "\.htm";
}

function navisection() {
    document.location = document.getElementById("navisection").value + "\.htm";
}

function insertlf() {
    num=romantxt.length-2;
    bnum=document.getElementById("lfnumber").value;
    brs="";
    for(i=1;i<=bnum;i++) {
        brs += "<br>";
    }
    for(i=1;i<=num;i++) {
        if(i<10) { fld='lf0'+i; } else  { fld='lf'+i; }
        document.getElementById(fld).innerHTML = brs;
    }
}

function alldisp_reading() {
    num=romantxt.length-2;
    for(i=1;i<=num;i++) {
        if(i<10) { obj='t0'+i+'r' } else  { obj='t'+i+'r' } 
        document.getElementById(obj).style.display='';
        if(i<10) { obj='t0'+i+'a' } else  { obj='t'+i+'a' } 
        document.getElementById(obj).style.display='';
    }
}

function allhide_reading() {
    num=romantxt.length-2;
    for(i=1;i<=num;i++) {
        if(i<10) { obj='t0'+i+'r' } else  { obj='t'+i+'r' } 
        document.getElementById(obj).style.display='none';
        if(i<10) { obj='t0'+i+'a' } else  { obj='t'+i+'a' } 
        document.getElementById(obj).style.display='none';
    }
}

function allroman_reading() {
    num=romantxt.length-2;
    for(i=1;i<=num;i++) {
        if(i<10) { obj='t0'+i+'r' } else  { obj='t'+i+'r' } 
        document.getElementById(obj).style.display='';
        if(i<10) { obj='t0'+i+'a' } else  { obj='t'+i+'a' } 
        document.getElementById(obj).style.display='none';
    }
}