function Opacityto(elm,v){
    elm.style.opacity = v/100; 
    elm.style.MozOpacity =  v/100; 
    elm.style.KhtmlOpacity =  v/100; 
    elm.style.filter=" alpha(opacity ="+v+")";
}
function getOpacity(elm) {
    var opt1 = getstyle(elm, "filter");
    var opt2 = getstyle(elm, "opacity");
    var opt3 = getstyle(elm, "MozOpacity");
    var opt4 = getstyle(elm, "KhtmlOpacity");
    if (opt1!="none") {
        opt = opt1.replace(/[^\d]+/g,"");
    }
    else {
        opt = (opt2!=null) ? opt2 : ((opt3!=null) ? opt3 : opt4);
        opt = opt*100;
    }
    return opt;
}