var activetimer = false;

function show_sub(id, onbox) {
	if (document.all){

	   var doc = document.all[id];
	   doc.style.display = "block";
	   
        if (!onbox) {
            window.setTimeout("hide_sub('"+id+"', true)", 1000);
            activetimer = true;
        } else {
            activetimer = false;
        }


	} else {

        var doc = document.getElementById(id);
        doc.setAttribute("style", "display: block;");

        if (!onbox) {
            window.setTimeout("hide_sub('"+id+"', true)", 1000);
            activetimer = true;
        } else {
            activetimer = false;
        }
	
	}
}

function hide_sub(id, calledbytimer) {
	if (document.all){

        if ( !activetimer && calledbytimer ) {
        }
        else {
			var doc = document.all[id];
            doc.style.display = "none";
        }
        
    } else {
    
        if ( !activetimer && calledbytimer ) {
        }
        else {
            var doc = document.getElementById(id);
            doc.setAttribute("style", "display: none;");
        }    
    
    }
}