function chg_sub_option(sObj,t){
    var v = sObj.value;
	var obj	= document.getElementById(t);

	if(!v || !sub_manu_arr[v]){
		obj.length = 1;
		add_opt(t,'没有数据',0,0);
        obj.options[1].selected=true;
		return false;
	}
	
	if(sObj.tagName=="SELECT"){
		i = obj.length;
		obj.options[i] = new Option("下载数据...","");
		obj.options[i].selected = true;
	}
	
	if(sub_manu_arr[v].length){
		obj.length = 1;
		for(manuid in sub_manu_arr[v]){
			//alert(manuid);
			add_opt(t,sub_manu_arr[v][manuid][0],manuid,sub_manu_arr[v][manuid][1]);
		}
	}
}

function add_opt(obj,text,value,is_red){
	s_obj = document.getElementById(obj);
	Opt_len = s_obj.length;
	newOpt = document.createElement("OPTION");
	newOpt.text = text;
	newOpt.value = value;
	if(1==is_red){
		newOpt.style.color = 'red';
	}
	app = navigator.appName;
	if(app.indexOf("Microsoft")!=-1){
		s_obj.add(newOpt);
	}else{
		s_obj.add(newOpt,s_obj.options[Opt_len+1]);
	}
}
function getPoss(el,sTOp) {
	var iPos = 0;
	while (el!=null) {
		iPos+=el["offset" + sTOp];
		el = el.offsetParent;
	}
	return iPos;
}
function showw(el,idd) {

	var m = document.getElementById(idd);
	m.style.left = getPoss(el,"Left")  + "px";
	m.style.top = getPoss(el,"Top") + el.offsetHeight -8+ "px";
	document.getElementById(idd).style.display="block";
}

function disp(idd){
	document.getElementById(idd).style.display="none";
}