function IsVis(o)
{
	if(!o || o.type=="hidden")
	return false;
	
	while(o && o.style && o.style.display!='none')
	{
	o = o.parentNode;	
	}
	return !o || !o.style;
}

function getObj(objID)
{
	if (document.getElementById) {return document.getElementById(objID);}
	else if (document.all) {return document.all[objID];}
	else if (document.layers) {return document.layers[objID];}
}

function objNext(f,d)
{
	var fFnd=false,el=f.elements,i=0;
	for(;i < el.length;i++)
	{
	if('hidden'!=el[i].type && false==el[i].disabled && IsVis(el[i]) && fFnd)return el[i];
	if(d.id==el[i].id)fFnd=true;
	}
	return null;
}

function objPrev(f,d)
{
	var fFnd=false,el=f.elements,i=el.length - 1;
	for(;i >= 0;i--)
	{
	if('hidden'!=el[i].type && false==el[i].disabled && IsVis(el[i]) && fFnd)return el[i];
	if(d.id==el[i].id)fFnd=true;
	}
	return null;
}

function loadselect (select, selvalue)
{
	var l = getObj(select).options.length;
	for (i=0;i<l;i++)
	{
		if (getObj(select).options[i].value == selvalue)
		{
			getObj(select).options[i].selected = true;
		}
	}
}