function coverage(tabId) 
    {
	    showTabName(tabId);
		var tabList = document.getElementById('tabnav');
		var navChar = tabId;
		var navLength = navChar.length;
		var navPrev = navLength - 1;
		var navLast = navChar.substring(navPrev,navLength);
/*		if(!isNaN(navLast)) 
		    {
			    navChar = navChar.substring(0,navPrev);
            }*/
		for(i=0; i<tabList.childNodes.length; i++) 
		    {
			    if(tabList.childNodes[i].nodeName=="LI") 
			        {
				        var list = tabList.childNodes[i];
				        if(list.id==navChar) 
				            {
					            list.className = "active";
				            } 
				        else 
				            {
					            list.className = "";
				            }
			        }
		    }
		var contentDiv = document.getElementById('contents');
		var divCollection = contentDiv.getElementsByTagName('div');
		for(i=0; i<divCollection.length; i++) 
		    {
			    var divLayer = divCollection.item(i);
			    if(divLayer.id.indexOf("tab_")!=-1) 
			        {
				        var ftabname = "tab_"+tabId;
				        if(divLayer.id==ftabname)
					        divLayer.style.display = "block";
				        else
					        divLayer.style.display = "none";
			        }
		    }
	}
	
function showTabName(t) 
    {
	    var charNum = t.length;
	    var prevChar = charNum - 1;
	    var lastChar = t.substring(prevChar,charNum);
	    var currentPage = Number(lastChar);
	    t = t.substring(0,prevChar);
	    currentCat = t;
	    var shortname = t;
	    if(charNum>15)
		    shortname = shortname.substring(0,15);
    }