function showarea(obj,areatarget)
{
var alltabtitle = obj.parentNode.parentNode.getElementsByTagName("li")
var allarea = obj.parentNode.parentNode.parentNode.getElementsByTagName("div")
		i=0
		while(i<=alltabtitle.length-1){
				alltabtitle[i].className="on2"
			i++
			}
		obj.parentNode.className="on"
		
		j=0
		while(j<=allarea.length-1){
			if (allarea[j].id!=areatarget){
				allarea[j].style.display="none"
				}else{
				allarea[j].style.display="block"
				}
			j++
			}			
}