function show_hint(texta)
{
        sp_hint.style.posLeft=event.clientX+10+document.body.scrollLeft;
        sp_hint.style.posTop=event.clientY+4+document.body.scrollTop;
        sp_hint2.style.posLeft=event.clientX+12+document.body.scrollLeft;
        sp_hint2.style.posTop=event.clientY+6+document.body.scrollTop;
        sp_hint.innerHTML=texta;
        sp_hint2.innerHTML=texta;
        sp_hint.style.visibility="visible";
        sp_hint2.style.visibility="visible";
}
function hide_hint()
{
        sp_hint.style.visibility="hidden";
        sp_hint.style.posLeft=0;
        sp_hint.style.posTop=0;
        sp_hint.innerHTML='';
        sp_hint2.style.visibility="hidden";
        sp_hint2.style.posLeft=0;
        sp_hint2.style.posTop=0;
        sp_hint2.innerHTML='';
}