// Funzione che apre un div e chiude tutti gli altri //

function THISonTHAToff(code) {

    ff = document.getElementsByTagName("div");
    for (i = 0; i < ff.length; i++) {
        if (ff[i].id.substr(0,5)=="onOff") {
            ff[i].style.display = "none";
        }
    }   
    for (i = 0; i < ff.length; i++) {
        if (ff[i].id == code) {
            if (ff[i].style.display == "none") {
                ff[i].style.display = "";
            }
        }
    }
}

function THISonTHAToff_itinerary(code) {

    ff = document.getElementsByTagName("div");
    for (i = 0; i < ff.length; i++) {
        if (ff[i].id.substr(0,8)=="itnonOff") {
            ff[i].style.display = "none";
        }
    } 
	for (i = 0; i < ff.length; i++) {
        if (ff[i].id.substr(0,5)=="onOff") {
            ff[i].style.display = "none";
        }
    }
    for (i = 0; i < ff.length; i++) {
        if (ff[i].id == code) {
            if (ff[i].style.display == "none") {
                ff[i].style.display = "";
            }
        }
    }
}

// Funzione che apre e chiude un div cliccando sul link //

function THISonTHISoff(code) {
    ff = document.getElementById(code);
		if (ff.style.display == "") {
			ff.style.display = "none";
		} else
		if (ff.style.display == "none") {
			ff.style.display = "";
		}
}

// Funzione che chiude un div cliccando sul link //

function THISoff(code) {
    ff = document.getElementById(code);
		if (ff.style.display == "") {
			ff.style.display = "none";
		}
}

// Funzione che apre la popup //

function Popup(url, stile) {
	window.open(url, "", stile);
	}
	
// Cambia classe //

function classChange(element,newclass) 
{
     document.getElementById(element).className = newclass;
}


<!-- FLASH ANIMATION SLIDER IN PAGINA FLOTTA -->

function reduce()
{
	$("#flash_container").animate({ height: 260 }, 800 );
	$("#flash_container").offsetHeight=260;
}

function expand(level)
{
	var size=260;		
	if (level)
		_expand(level, size)
}

function _expand(level, size)
{
	var containerFixedHeight=260;
	if (level && size)//
	{
		switch(level)
		{
			case 1 :    if ($("#flash_container").height()!=containerFixedHeight)
							reduce();
						$("#flash_container").animate({ height: size}, 800 ); 
						//$("#flash_container").offsetHeight=size;					
					 break;
			case 2 : 	if ($("#flash_container").height()!=containerFixedHeight)
							//reduce();
						$("#flash_container").animate({ height: containerFixedHeight+245}, 800 );
						//$("#flash_container").offsetHeight=containerFixedHeight+size;		
					 break;
			case 3 : if ($("#flash_container").height()!=containerFixedHeight)
							//reduce();
						$("#flash_container").animate({ height: containerFixedHeight+(size+347)}, 800 );
						//$("#flash_container").offsetHeight=containerFixedHeight+(size*2);
		}
	}
}

<!-- FINE FLASH ANIMATION SLIDER IN PAGINA FLOTTA -->