function Change(btnid,tabid,tabnumber,tabpanecss,selectcss) //btnid 当前按钮id值 tabid 内容及按钮前缀名
{
for (i = 1;i<=tabnumber;i++)
{
document.getElementById(tabid+"_btn"+i).className =tabpanecss;
document.getElementById(tabid+"_sub"+i).style.display= "none"; 
} 
document.getElementById(tabid+"_btn"+btnid).className =selectcss;
document.getElementById(tabid+"_sub"+btnid).style.display ="";
}