   <!--求购信息切换-->
   function showObj(flag)
{
    var objID0="supply";
    var objID1="demand";
    var objID0="cooper"; 
    var objID="supply";
    var obj_navID="supply_nav"; 
    var obj_moreID="supply_more"; 
    
    for(var i=0;i<3;i++)
    {     
            if(i==0)
            {
                 objID="supply";
                 obj_navID="supply_nav";
                 obj_moreID="supply_more"
            }  
            if(i==1)
            {
                 objID="demand";
                 obj_navID="demand_nav";
                 obj_moreID="demand_more"
            }
            if(i==2)
            {
                 objID="cooper";
                 obj_navID="cooper_nav";
                 obj_moreID="cooper_more"
            }
           document.getElementById(objID).style.display="none";
           document.getElementById(obj_moreID).style.display="none"; 
           document.getElementById(obj_navID).className="t_normal";
    } 
    if(flag==0)
    {
         objID="supply";
         obj_navID="supply_nav";
         obj_moreID="supply_more"
    }  
    if(flag==1)
    {
         objID="demand";
         obj_navID="demand_nav";
         obj_moreID="demand_more"
    }
    if(flag==2)
    {
         objID="cooper";
         obj_navID="cooper_nav";
         obj_moreID="cooper_more"
    } 
    document.getElementById(objID).style.display="block";
    document.getElementById(obj_moreID).style.display=""; 
    document.getElementById(obj_navID).className="t_nav";
}
   function showAlliance(flag)
{
    var obj="showAlliance1";
    if(flag==1)
    {
        obj = "showAlliance2";
        document.getElementById("showAlliance1").style.display="none";
        document.getElementById(obj).style.display="";
    } 
    else
   {
        obj = "showAlliance1";
        document.getElementById("showAlliance2").style.display="none";
        document.getElementById(obj).style.display="";        
   }  
} 

function menu_leftover(newid,sign)
{
    if(newid!=lastHeaderMenuIndex)
    {
     if(sign&&document.getElementById("headermenu" + newid))
     {
        document.getElementById("headermenu" + newid).className="menu_overleft";
        document.getElementById("headermenu" + newid+"_"+newid).className="menu_overright";
     } 
     else
     {
        document.getElementById("headermenu" + newid).className="menu_normalleft1";
        document.getElementById("headermenu" + newid+"_"+newid).className="menu_normalright1";    
     }  
    }
}
function menu_leftover1(newid,sign)
{

     if(sign&&document.getElementById("headermenu" + newid))
     {
        document.getElementById("headermenu" + newid).className="menu_overleft1";
        document.getElementById("headermenu" + newid+"_"+newid).className="menu_overright1";
     } 
     else
     {
        document.getElementById("headermenu" + newid).className="menu_normalleft";
        document.getElementById("headermenu" + newid+"_"+newid).className="menu_normalright";    
     }  
}