function visualizza_contratto(ID)
	{
		document.getElementById(ID).style.display = 'block'
	}
	
function visualizza(ID)
	{
		document.getElementById(ID).style.top = event.clientY + 'px'
		document.getElementById(ID).style.left = event.clientX + 'px'
		document.getElementById(ID).style.display = 'block'
	}

function nascondi(ID)
	{
		document.getElementById(ID).style.display = 'none'
	}
	
function page_on(ID)
	{
		document.getElementById(current_item).style.display = 'none'
		document.getElementById(ID).style.display = 'block'
		current_item = ID
	}

function page_prec()
	{
		if (current_item > 1) {
			document.getElementById(current_item).style.display = 'none'
			current_item = current_item - 1
			document.getElementById(current_item).style.display = 'block'
		}
	}

function page_succ(maximum)
	{
		if (current_item < maximum) {
			document.getElementById(current_item).style.display = 'none'
			current_item = current_item + 1
			document.getElementById(current_item).style.display = 'block'
		}
	}