function ridim() {
    if(!(document.all)) {
        if(document.getElementById("dx").clientHeight>window.innerHeight) {
            document.getElementById("sx").style.height= document.getElementById("dx").clientHeight+"px";
        }
        else {
            document.getElementById("sx").style.height= window.innerHeight+"px";
            document.getElementById("dx").style.height= window.innerHeight+"px";
            document.getElementById("contenitore_dx").style.height= window.innerHeight+"px";
        }
    }
    else {
        if(document.getElementById("dx").clientHeight>document.body.clientHeight) {
            document.getElementById("sx").style.height= document.getElementById("dx").clientHeight+"px";
        }
        else {
            document.getElementById("sx").style.height= document.body.clientHeight+"px";
            document.getElementById("dx").style.height= document.body.clientHeight+"px";
            document.getElementById("contenitore_dx").style.height= document.body.clientHeight+"px";
        }
    }
}