function showCurrent(SCId){
	if(SCId.length>4){
		SCId=SCId.substring(0,4);
	}
	if(SCId.length==4){
		//二级子栏目
		if(eval("document.all." + SCId)!=null){
			eval(SCId).onmouseover="";
			eval(SCId).onmouseout="";
			eval(SCId).className="bbs_on";
			eval(SCId).parentElement.parentElement.parentElement.show="true";
			eval(SCId).parentElement.parentElement.parentElement.style.display="block";
			if(eval("document.all." + SCId.substring(0,2))!=null){
				eval(SCId.substring(0,2)).className="current";
				eval(SCId.substring(0,2)).children[0].src=ChnlPath + "/current.gif"  
				eval(SCId.substring(0,2)).children[1].className="menu1";
				//eval(SCId.substring(0,12)).className="normal";
				//eval(SCId.substring(0,12)).children[0].src="/style" + ChnlPath + "/menu.gif" 
				//eval(SCId.substring(0,12)).children[1].className="menu2";
				//eval(SCId.substring(0,12)).children[1].removeAttribute("href");
			}
		}else{
			SCId=SCId.substring(0,2);
			if(eval("document.all." + SCId)!=null){
				eval(SCId).className="current";
				eval(SCId).children[0].src=ChnlPath + "/current.gif" 
				eval(SCId).children[1].className="menu1";
			}
		}
	}else if(SCId.length==2){
		//一级子栏目
		if(eval("document.all." + SCId)!=null){
			eval(SCId).className="current";
			eval(SCId).children[0].src=ChnlPath + "/current.gif" 
			eval(SCId).children[1].className="menu1";
		}
	}
	
	//删除所有不显示的二级栏目
	var i=0;
	if(document.all.LV2SC!=null && LV2SC.length==null){
		if(SCId.length==2 && LV2SC.rows[0].cells[0].id.substring(0,12)==SCId){
			LV2SC.style.display="block"
		}
		if(LV2SC.style.display=="none"){
		    NavTab.deleteRow(LV2SC.parentElement.parentElement.rowIndex-1);
			NavTab.deleteRow(LV2SC.parentElement.parentElement.rowIndex);
		}
	}
	for(;document.all.LV2SC!=null && LV2SC.length!=null && LV2SC[i]!=null;){
		if(SCId.length==2 && LV2SC[i].rows[0].cells[0].id.substring(0,2)==SCId){
			LV2SC[i].style.display="block"
		}
		if(LV2SC[i].style.display=="block"){
			i++;
		}else{
			NavTab.deleteRow(LV2SC[i].parentElement.parentElement.rowIndex-1);
			NavTab.deleteRow(LV2SC[i].parentElement.parentElement.rowIndex);
				//LV2SC.style.display="none";
		}
	}
}