// just.js
// Learning Programming "just" widget
// RJM Programming
// November 2015

var waswords, aq, oaq, qqcnt=0, oxaal;

function qthere(iois) {
 var ee, eee, isthere=false, str="", prevw='', isoky=true;
 var xxrnum = Math.floor(Math.random() * 1000) + 1;
 aq='<iframe id="justiframe" onload="qthere(this);" src="http://www.rjmprogramming.com.au/Learning/Programming/index5.php?random=' + xxrnum + '" title="Just Questions" style="width:100%;height:600px;"></iframe>';
 oaq=document.getElementById('justdiv');
 try {
  if (iois != null) {
    var aconto = (iois.contentWindow || iois.contentDocument); 
    if (aconto != null) {
     if (aconto.document) { aconto = aconto.document; }
     if (aconto.body != null) {
       try {
        str=aconto.body.innerHTML;
        if (str.length > 0) {
          if (str.toLowerCase().indexOf(">not found<") == -1 && str.toLowerCase().indexOf("our home page for your perusal") == -1) isthere=true;
          if (isthere) {
            var answers=aconto.body.innerHTML.split('>Answer: ');
            var answer=answers[1].substring(0,1);
            var explanationspt=aconto.body.innerHTML.split('>Why');
            var explanations=explanationspt[1].split('<');
            var explanation='Why' + explanations[0];
            waswords=aconto.body.innerHTML; // getElementById('words').innerHTML;
            if (isoky) {
             waswords=waswords.replace('<br>' + answer, '<br><a style="text-decoration:underline;" onclick="alert(' + "'" + 'Well done ... correct!' + "'" + ');   oaq.innerHTML=aq; " title="' + answer + '">' + answer + '</a>');
             for (var iiy=65; iiy<=70; iiy++) {
              if (prevw != waswords && String.fromCharCode(iiy) != answer) {
               prevw=waswords;
               waswords=waswords.replace('<br>' + String.fromCharCode(iiy), '<br><a style="text-decoration:underline;" onclick="alert(' + "'" + 'No, sorry, the answer is ' + answer + '.  ' + explanation + "'" + '); oaq.innerHTML=aq;  " title="' + String.fromCharCode(iiy) + '">' + String.fromCharCode(iiy) + '</a>');
              }
             }
             waswords+='<br><a onclick="alert(' + "'" + 'No, sorry, the answer is ' + answer + '.  ' + explanation + "'" + '); oaq.innerHTML=aq;  " title="?">?</a>';
             var ttopic = location.search.split('topic=')[1] ? location.search.split('topic=')[1].split('&')[0] : " ";
             if (document.getElementById('topic').value.replace(' ','') != '' || ttopic.replace(' ','') != '') {
              if (ttopic.replace(' ','') == '') ttopic = document.getElementById('topic').value;
              if (aconto.body.innerHTML.toLowerCase().replace('?',' ').indexOf(' ' + ttopic.toLowerCase().replace('!','') + ' ') == -1 && aconto.body.innerHTML.toLowerCase().replace('?',' ').indexOf(' ' + ttopic.toLowerCase().replace('!','') + ',') == -1 && aconto.body.innerHTML.toLowerCase().replace('?',' ').indexOf('(' + ttopic.toLowerCase().replace('!','') + ')') == -1 && aconto.body.innerHTML.toLowerCase().replace('?',' ').indexOf(' ' + ttopic.toLowerCase().replace('!','') + '.') == -1 && aconto.body.innerHTML.toLowerCase().replace('?',' ').indexOf(' ' + ttopic.toLowerCase().replace('!','') + '<') == -1 && aconto.body.innerHTML.toLowerCase().replace('?',' ').indexOf('>' + ttopic.toLowerCase().replace('!','') + ' ') == -1) {
               isoky=false;
               qqcnt++;
               if (eval(qqcnt) >= 20) {
                   qqcnt=0;
               setTimeout(flip, 200);
               } else {
               setTimeout(reworkit, 200);
               }
              } else {
                  qqcnt=0;
               setTimeout(flip, 200);
              }
             } else {
                 qqcnt=0;
              setTimeout(flip, 200);
             }
            }
          }
        }
       } catch (ee) { }
     }
    }
  }
 } catch (eee) { }
 return isthere;
}

function reworkit() {
 var xxxrnum = Math.floor(Math.random() * 1000) + 1;
 document.getElementById('justiframe').src='http://www.rjmprogramming.com.au/Learning/Programming/index5.php?random=' + xxxrnum;
}

function flip() {
    document.getElementById('justdiv').innerHTML=waswords;
    qqcnt=0;
}

function overlayall() {
  var ijw=document.getElementById('justwidget');
  var xrnum = Math.floor(Math.random() * 1000) + 1;
  if (ijw != null) {
    ijw.style.position='absolute';
    ijw.style.zIndex='7';
    ijw.style.top='0px';
    ijw.style.left='0px';
    ijw.style.width='100%';
    ijw.style.height='800px';
    ijw.style.opacity='0.85';
    ijw.style.backgroundColor='yellow';
    oxaal.style.backgroundColor='yellow';
    ijw.innerHTML+='<br><div id="justdiv"><iframe id="justiframe" onload="qthere(this);" src="http://www.rjmprogramming.com.au/Learning/Programming/index5.php?random=' + xrnum + '" title="Just Questions" style="width:100%;height:600px;"></iframe></div>';
  }
}


function changeJTopic(osis) {
 if (osis.value == 'Back') {
  location.href=document.URL.replace('&just=', '&jxst=');
 } else if (document.getElementById('topic').value != osis.value) {
  //document.getElementById('topic').value=osis.value;
  location.href=document.URL.replace('topic=', 'txpic=').replace('endthis=', 'exdthis==') + '&topic=' + osis.value + '&endthis=Y&just=y';
 } else {
  overlayall();
 }
}

function justwidget() {
  var ojw=document.getElementById('justwidget'), backc='';
  oxaal=document.getElementById('xaal');
  if (ojw == null && oxaal != null) {
   var otopic=document.getElementById('topic');
   if (otopic != null) {
    var searchfor='>' + oxaal.innerHTML + '<';
    var spans=document.getElementsByTagName('span');
    for (var ispans=0; ispans<spans.length; ispans++) {
      if (spans[ispans].innerHTML.indexOf(searchfor) != -1) {
        var thisspan=spans[ispans].innerHTML;
        var ttopic = location.search.split('topic=')[1] ? location.search.split('topic=')[1].split('&')[0] : " ";
        if (ttopic != ' ') backc='<option value="Back">Back</option>';
        spans[ispans].innerHTML='<div id="justwidget" style="display: inline;">&nbsp;&nbsp;<select id="widgettopic" title="Topic" onchange="changeJTopic(this);" style="background-color:red;color:lightgray;display:inline;width:100px;"><option value=" ">Just</option>' + backc + otopic.innerHTML.replace(' value="' + ttopic + '"', ' value="' + ttopic + '" selected') + '</select>' + thisspan;
      }
    }
   }
  }
  if (document.URL.indexOf('&just=') != -1) {
   overlayall();
  }
}


setTimeout(justwidget, 1000);