function shadowBox() {
  if (!document.createElement)return false;
  if (!document.getElementById)return false;
  var mainContent = document.createElement("div");
  mainContent.setAttribute("id","mainContent");
  var leftSide = document.createElement("div");
  leftSide.setAttribute("id","leftSide");
  var rtSide = document.createElement("div");
  rtSide.setAttribute("id","rtSide");
  var topLeft = document.createElement("div");
  topLeft.setAttribute("id","topLeft");
  var topRight = document.createElement("div");
  topRight.setAttribute("id","topRight");
  var botLeft = document.createElement("div");
  botLeft.setAttribute("id","botLeft");
  var mainContentWrap = document.getElementById("mainContentWrap");
  var content = document.getElementById("content");
  content.appendChild(mainContent);
  mainContent.appendChild(leftSide);
  leftSide.appendChild(rtSide);
  rtSide.appendChild(topLeft);
  topLeft.appendChild(topRight);
  topRight.appendChild(botLeft);
  botLeft.appendChild(mainContentWrap);
}
addLoadEvent(shadowBox);