function Show_BlkBlackTab(BlkBlackTabid_num,BlkBlackTabnum)
{
	for(var i=0;i<=3;i++)
	{
	    document.getElementById("BlkBlackTabcontent_"+BlkBlackTabid_num+i).style.display="none";
	}
	
	for(var i=0;i<=3;i++)
	{
	    document.getElementById("BlkBlackTabmenu_"+BlkBlackTabid_num+i).style.backgroundImage="url()";
	}
	
	document.getElementById("BlkBlackTabmenu_"+BlkBlackTabid_num+BlkBlackTabnum).style.backgroundImage="url(/Skin/qianyi/onus_menu_bg.gif)";
	document.getElementById("BlkBlackTabcontent_"+BlkBlackTabid_num+BlkBlackTabnum).style.display="";
}
/*
参数说明下：
   BlkBlackTabid_num：菜单ID
   BlkBlackTabnum：显示内容ID
   i：菜单个数
   BlackOn：css样式名
   */