function getSelectedValue(listid){
	var srcList=document.getElementById(listid);
	i=srcList.selectedIndex;
	if(i!=null&&i>-1){
		return srcList.options[i].value
	}else{
		return null
	}
}



function ira(ira){

if (!ira){
	var mes;
	donde= getSelectedValue("lista_mes");
		if (donde!="")
	{
	window.location.href = donde;
		}
	} else {
	donde= getSelectedValue("combo1");
		if (donde!="")
	{
	window.location.href = donde;
	}
	}

}