<!--
function show_tbl(pre,n,select_n){
for(i=0;i<n;i++){
var tbl= document.getElementById(pre+i);
tbl.style.display="none";
if(i==select_n){
tbl.style.display="block";
}
}
}
function show_tab(pre,n,select_n,bg_item,x,y){
document.getElementById(bg_item).style.background= "url(/css/index/index_tab_title_bg.gif) no-repeat " + x + "px " + y + "px";
show_tbl(pre,n,select_n);
}
function change_channel(pre,n,select_n,a_id,a_class){
for(i=0;i<n;i++){
var tbl= document.getElementById(pre+i);
var aid=document.getElementById(a_id+i);
tbl.style.display="none";
aid.className="";
if(i==select_n){
tbl.style.display="block";
aid.className=a_class;
}
}
}
function change_bg(itemn,bgimg){
document.getElementById(itemn).style.background="url(/css/" + bgimg + ")";
}
function PConlineLogin()
{
if (mainform.username.value == "" || mainform.username.value == "guest") {	  
mainform.submit();
}
if (mainform.password.value == "") {
alert("请输入您的密码！");
mainform.password.focus();
return false;
}
}
function MM_jumpMenu(targ,selObj,restore){ //v3.0
eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
if (restore) selObj.selectedIndex=0;
}
//-->