function leftadd(){
    leftcount = parseInt(document.getElementById('leftcount').value);
	leftaddElement();
	leftcount = leftcount + 1;
    document.getElementById('leftcount').value = leftcount;
}
function leftsubtract(){
    leftcount = parseInt(document.getElementById('leftcount').value);
	if (leftcount > 1) {
		var num = leftcount - 1;
		var removestring = num;
		leftremoveElement(removestring);
		leftcount = leftcount - 1;
        document.getElementById('leftcount').value = leftcount;
	}
}
function leftaddElement() {
  var main = document.getElementById('myform');
  var bef = document.getElementById('leftplus');
  var symbol = document.createElement('input');
  var varname = document.createElement('input');
  var addspace = document.createElement('span');
  var addbreak = document.createElement('div');
  var varnameid = 'left' + leftcount;
  var addspaceid = 'addspaceleft' + leftcount;
  var symbolid = 'leftsymbol' + leftcount;
  var addbreakid = 'breakleft' + leftcount;
  addspace.innerHTML = '&nbsp&nbsp&nbsp&nbsp&nbsp ';
  addspace.setAttribute('id', addspaceid);
  symbol.setAttribute('name', 'leftlatexsymbol[]');
  symbol.setAttribute('size', '16');
  symbol.setAttribute('id', symbolid);
  varname.setAttribute('name', 'leftvar[]');
  varname.setAttribute('size', '46');
  varname.setAttribute('id', varnameid);
  addbreak.setAttribute('id', addbreakid);
  main.insertBefore(symbol, bef);
  main.insertBefore(addspace, bef);
  main.insertBefore(varname, bef);
  main.insertBefore(addbreak, bef);
}
function leftremoveElement(divNum) {
  var main = document.getElementById('myform');
  var oldsymbol = document.getElementById('leftsymbol' + divNum);
  var oldvarname = document.getElementById('left' + divNum);
  var oldspace = document.getElementById('addspaceleft' + divNum);
  var oldbreak = document.getElementById('breakleft' + divNum);
  main.removeChild(oldsymbol);
  main.removeChild(oldvarname);
  main.removeChild(oldspace);
  main.removeChild(oldbreak);
}

function rightadd(){
    rightcount = parseInt(document.getElementById('rightcount').value);
	rightaddElement();
	rightcount = rightcount + 1;
    document.getElementById('rightcount').value =rightcount;
}
function rightsubtract(){
    rightcount = parseInt(document.getElementById('rightcount').value);
	if (rightcount > 1) {
		var num = rightcount-1;
		var removestring = num;
		rightremoveElement(removestring);
		rightcount = rightcount - 1;
        document.getElementById('rightcount').value =rightcount;
	}
}
function rightaddElement() {
  var main = document.getElementById('myform');
  var bef = document.getElementById('rightplus');
  var symbol = document.createElement('input');
  var varname = document.createElement('input');
  var addspace = document.createElement('span');
  var addbreak = document.createElement('div');
  var varnameid = 'right' + rightcount;
  var addspaceid = 'addspaceright' + rightcount;
  var symbolid = 'rightsymbol' + rightcount;
  var addbreakid = 'breakright' + rightcount;
  addspace.innerHTML = '&nbsp&nbsp&nbsp&nbsp&nbsp ';
  addspace.setAttribute('id', addspaceid);
  symbol.setAttribute('name', 'rightlatexsymbol[]');
  symbol.setAttribute('size', '16');
  symbol.setAttribute('id', symbolid);
  varname.setAttribute('name', 'rightvar[]');
  varname.setAttribute('size', '46');
  varname.setAttribute('id', varnameid);
  addbreak.setAttribute('id', addbreakid);
  main.insertBefore(symbol, bef);
  main.insertBefore(addspace, bef);
  main.insertBefore(varname, bef);
  main.insertBefore(addbreak, bef);
}
function rightremoveElement(divNum) {
  var main = document.getElementById('myform');
  var oldsymbol = document.getElementById('rightsymbol' + divNum);
  var oldvarname = document.getElementById('right' + divNum);
  var oldspace = document.getElementById('addspaceright' + divNum);
  var oldbreak = document.getElementById('breakright' + divNum);
  main.removeChild(oldsymbol);
  main.removeChild(oldvarname);
  main.removeChild(oldspace);
  main.removeChild(oldbreak);
}

function post(){
var left = document.getElementById('left1').innerHTML.getElementById('leftvar1').value;
var right = document.getElementById('right1').innerHTML.getElementById('rightvar1').value;
document.write(left + "<br>");
document.write(right + "<br>");
}