var check_preload;
function preload_page() {
  if(check_preload) {
    if(document.getElementById("menu_slide_tabe")) document.getElementById("menu_slide_tabe").style.visibility = "visible";
	if(document.getElementById("content")) document.getElementById("content").style.visibility = "visible";
    document.getElementById("load").style.visibility = "hidden";
  }
}