var nCho= [1,1,1,1,1, 1,1,1,1,1, 1,1,1,1,1, 1,1,1,1];
var nJung=[1,1,1,1,1, 1,1,1,1,2, 2,2,1,1,2, 2,2,1,1,2, 1];
var nJong=[0,1,1,2,1, 2,2,1,1,2, 2,2,2,2,2, 2,1,1,2,1, 1,1,1,1,1, 1,1,1];

var dv=21*28;
var start=false, dt=0, avt=0, topt=0, avp=0, exn=0;

function gId(id) { return document.getElementById(id); }
function sId(id,s) { document.getElementById(id).innerHTML=s; }

function xHDiv(hg) {
 var hc,cho,jung,jong;
 hc=hg.charCodeAt(0)-0xAC00;//ubase1;
 if(hc<0) return 1;
 cho=Math.floor(hc/dv);
 hc=hc%dv;
 jung=Math.floor(hc/28);
 jong=hc%28;
 var tn=nCho[cho]+nJung[jung]+nJong[jong];
 return tn;
}
function xCalN(s) {
 var l=s.length;
 var i=0, tn=0, c;
 while(i<l) {
  if(s.charCodeAt(i)<200) tn++;
  else tn+=xHDiv(s.charAt(i));
  i++;
 }
 return tn;
}
function xCkStr() {
 dt=((new Date).getTime()-dt);
 if(dt<1) dt=1;
 start=false;
 var fe=document.forms['f1'].elements;
 var s1=fe['t1'].value, s2=fe['t2'].value;
 fe['t2'].value="";
 var l1=s1.length, l2=s2.length;
 if(l1<3) { alert("연습할 단어나 문장을 3자 이상 입력하세요!"); fe['t1'].focus(); return; }
 if(l2<3) { alert("윗글의 내용을 끝까지 입력하세요!"); fe['t2'].focus(); fe['t2'].value=""; return; }
 var l=(l1>l2)?l1:l2;
 var on=0;
 for(var i=0;i<l;i++) {
   if(s1.charAt(i)==s2.charAt(i)) on++;
 }
 var t=Math.floor((xCalN(s2)*60000)/dt);
 var p=Math.floor((on*100)/l1);
 if(t>topt) topt=t;
 avt=((avt*exn)+t)/(exn+1);
 avp=((avp*exn)+p)/(exn+1);
 sId('t3', t);
 sId('t4', p);
 sId('t5', Math.floor(avt));
 sId('t6', Math.floor(avp));
 sId('t7', topt);
 exn++;
}
function xKeyDown() {
  if(start==false) { dt=(new Date).getTime(); start=true; }
  var k=event.keyCode;
  if(k==13) {
    xCkStr();
    xStartItv();
  }
}
function xPaste() {
 window.clipboardData.setData("Text", "");
}
oItv="";
function xStartItv() {
  if(oItv) clearInterval(oItv);
  if(start) return;
 oItv=setInterval("xItv()",1000);
}
function xItv() {
  if(start) { clearInterval(oItv); return; }
  if(document.forms['f1'].elements['t2'].value.length>0) {dt=(new Date).getTime(); start=true; clearInterval(oItv); }
}