function e_openChild() {
  w = window.open("hyoushie.html", "hyoushie", "width=415, height=600");
}

function f_openChild() {
  w = window.open("tizu.html", "tizu", "width=660, height=460, menubar=yes");
}

function d_openChild() {
  w = window.open("yukata.html", "yukata", "width=780, height=660, menubar=yes");
}

function optionMenu(opt) {
  location.href = opt.options[opt.selectedIndex].value;
}