document.getElementsByClassName = function (className) {
var i, j, eltClass;
var objAll = document.getElementsByTagName ? document.getElementsByTagName("p") : document.all;
var objCN = new Array();
for (i = 0; i < objAll.length; i++) {
eltClass = objAll[i].className.split(/\s+/);
for (j = 0; j < eltClass.length; j++) {
if (eltClass[j] == className) {
objCN.push(objAll[i]);
break;
}
}
}
return objCN;
}
function classopen() {
CLASS1 = document.getElementsByClassName("japanese");
for(i=0;i<CLASS1.length;i++) {
CLASS1[i].style.display = "block";
}
CLASS2 = document.getElementsByClassName("english");
for(i=0;i<CLASS2.length;i++) {
CLASS2[i].style.display = "none";
}
}
function classclose() {
CLASS2 = document.getElementsByClassName("english");
for(i=0;i<CLASS2.length;i++) {
CLASS2[i].style.display = "block";
}
CLASS1 = document.getElementsByClassName("japanese");
for(i=0;i<CLASS1.length;i++) {
CLASS1[i].style.display = "none";
}
}