function $(id)
{	
    //debugger;
	return document.getElementById(id);
}

//objId为A链接的ID前缀，objContId为显示层的ID前缀，Num为当前tab编号,TotalNum所有tab数量
function tabOver(objId,objContId,Num,TotalNum,classNameOn,classNameOff)
{ 
    var tabNum = TotalNum;
    //debugger;
    for(var i=1;i<=tabNum;i++)
    {
	    var tab = $(objId+i);
	    var tabCont = $(objContId+i);
	    if(i==Num)
	    {
		    tabCont.style.display='block';
		    tab.className = classNameOn;
	    }
	    else
	    {
		    tabCont.style.display='none';
		    tab.className = classNameOff;
	    }
    }	
}

function DivShow(state,PopUpId)   
{ 
    //when flash hide the DIv,use (wmode="opaque") in  embed tag and use (<param name="wmode" value="transparent">) in object tag;
    //build by legou@msn.cn 
    var   ShowDiv   =   document.getElementById(PopUpId); 
    var   IfrShim   =   document.getElementById("shimmer4"+PopUpId);
    if(!IfrShim)
    {
        ShowDiv.style.display   =   "block";
        createShim(PopUpId); 
        ShowDiv.style.display   =   "none";
        IfrShim   =   document.getElementById("shimmer4"+PopUpId) 
    }
    if(state)   
    {  
        ShowDiv.style.display   =   "block"; 
        IfrShim.style.display   =   "block";
    }   
    else   
    {   
        ShowDiv.style.display   =   "none"; 
        IfrShim.style.display   =   "none";    
    } 
}
function createShim(PopUpId) 
{ 
    var ShowDiv   =   document.getElementById(PopUpId);   
    var DivParent = ShowDiv.parentNode;
    var shimmer = document.createElement('iframe');   
    shimmer.id='shimmer4'+PopUpId;   
    shimmer.style.position='absolute';   
    shimmer.style.top=ShowDiv.offsetTop;   
    shimmer.style.left=ShowDiv.offsetLeft; 
    shimmer.style.width=ShowDiv.offsetWidth;   
    shimmer.style.height=ShowDiv.offsetHeight; 
    shimmer.style.display='none';  
    shimmer.style.zIndex=ShowDiv.style.zIndex - 1;  
    shimmer.setAttribute('frameborder','0');   
    shimmer.setAttribute('src','javascript:void(0);');   
    DivParent.appendChild(shimmer);   
}