체크 박스를 위한 기능

+var isLimitedCheckbox = document.getElementById('is-limited')
+var isLimitedNumInput = document.getElementById('is-limited-num-input')
+var isLimitedAlerter = document.getElementById('is-limited-alerter')
+
+window.onload = function () {
+  document.getElementsByTagName('body')[0].classList.remove('preload')
+}
+isLimitedCheckbox.onchange = function () {
+  if (isLimitedCheckbox.checked) {
+    document.getElementById('is-limited-wrapper').style = "background-color: #fff;"
+  } else {
+    document.getElementById('is-limited-wrapper').style = "background-color: rgba(0, 0, 0, 0);"
+  }
+}
+isLimitedNumInput.onchange = function () {
+  if (isLimitedNumInput.value < 12) {
+    isLimitedAlerter.innerHTML = '12자리 이상!'
+  } else {
+    isLimitedAlerter.innerHTML = '글자수 제한'
+  }
+}
+
+
+function umfinder (value) {
+  if (value === '엄') {document.getElementById('supersecret-document').style.display = 'block'}
+}
+
+function joonsikfinder (value) { 
+  // 이걸 보고 있는 넌 너무 많은걸 알아버렸어
+  var bodyEle = document.getElementsByTagName('body')[0]
+  var titleIdentifiers = document.getElementsByClassName('title-identifier')
+  if (value === '엄준식') {
+    bodyEle.className = ''	
+    //bodyEle.classList.add('joonsik')	
+    titleIdentifiers[0].innerHTML = '엄준식'	
+    titleIdentifiers[1].innerHTML = '엄준식을'
+  } else if (value === '박원순') {
+  } else if (value === '트럼프') {
+  } else {
+    bodyEle.className = ''
+    titleIdentifiers[0].innerHTML = '악질 이름'
+    titleIdentifiers[1].innerHTML = '악질 이름을'
+  }
+}
+
+var checkboxLabelers = document.getElementsByClassName('checkboxlabeler-input')
+for (checkboxLabeler in checkboxLabelers) {
+  checkboxLabeler.onchange = function () {
+    if (checkboxLabeler.checked) {
+    } else {
+    }
+  }
+}
+