var fs_default   = 11;
var prefs_loaded = false;
var fs_current   = fs_default;

function fs_change(diff){
    //fs_current = parseInt(fs_current) + parseInt(diff * 5);
	fs_current = parseInt(fs_current) + parseInt(diff * 2);
	
    if(fs_current > 16){
        fs_current = 16;
    }else if(fs_current < 7){
        fs_current = 7;
    }
	
	if(diff==0) fs_current=fs_default;
	
    fs_set(fs_current);
}
function fs_set(fs){
    fs_current = fs;
   // $E('body').setStyle('font-size', fs + '%');
	//document.body.style.fontSize = fs + "%";
	document.body.style.fontSize = fs + "px";
}


function switch_fontsize(valore)
		{
			switch(valore)
			{
				case 1:
				document.body.style.fontSize = "small";
				break;
				case 2:
				document.body.style.fontSize = "1em";
				break;
				case 3:
				document.body.style.fontSize = "1.1em";
				break;
			}
		}
		




		
function switch_fonti(iFonte)
{
	var check_on="img/check_1.png";
	var check_off="img/check_0.png";
	var sValue=document.getElementById('fonte_'+iFonte).src;
	//alert(sValue);
	sValue=sValue.slice(-11);
	//alert(sValue);
	if(sValue=="check_0.png")
		{
			var action=1;
		}
		else
		{
			//var action=0;
			return false;
		}
	
	for(var j=1;j<4;j++)
	{
		current_img=document.getElementById('fonte_'+j).src;
		current_img=current_img.slice(-11);
		if(action==1)
		{
			if(j==iFonte)
			{
				document.getElementById('fonte_'+j).src=check_on;
				document.getElementById('fonte_'+j+'_input').value="1";
				document.getElementById('operatori_fonte_'+j).style.display='block';
			}
			else
			{
				document.getElementById('fonte_'+j).src=check_off;
				document.getElementById('fonte_'+j+'_input').value="0";
				document.getElementById('operatori_fonte_'+j).style.display='none';
			}
		}
		else
		{
			if(j==iFonte)
			{
				document.getElementById('fonte_'+j).src=check_off;
				document.getElementById('fonte_'+j+'_input').value="0";
				document.getElementById('operatori_fonte_'+j).style.display='none';
			}
			else
			{
				document.getElementById('fonte_'+j).src=check_on;
				document.getElementById('fonte_'+j+'_input').value="1";
				document.getElementById('operatori_fonte_'+j).style.display='block';
			}
		}
		
	}
}

function gotourl(pagina)
{
	document.location.href=''+pagina+'';
}

function ShowHidebyId(selectedId)
{
	if(document.getElementById(selectedId)!=undefined)
	{
		if(document.getElementById(selectedId).style.display=='none')
		{
			document.getElementById(selectedId).style.display='block';
		}
		else
		{
			document.getElementById(selectedId).style.display='none';
		}
	}
}

function MouseOverClass(element,class_mouseover)
{
	element.className=class_mouseover;
}

function MouseBlurClass(element,class_default)
{
	element.className=class_default;
}