<!--
function show_tab(pre,pree,n,select_n,css,css2) {
for (i = 1; i <= n; i++) {
var intro = document.getElementById(pre + i);
var cha = document.getElementById(pree + i);
intro.style.display = "none";
cha.className=css2;
if (i == select_n) {
intro.style.display = "block";
cha.className=css;
}
}
}
-->