function preview_new(ldz){
if (ldz.style.display!="block"){
ldz.style.display="block";}
else{ldz.style.display="none";}
}
function show_search(){
if (news_search.style.display!="block"){
news_search.style.display="block";}
else{news_search.style.display="none";}
}
function news_size(size1){
news_content.style.fontSize=size1;
}
function show_chaxun(){
if (wt_main.style.display!="block"){
wt_main.style.display="block";}
else{wt_main.style.display="none";}
}