var minsize = 100;
var maxsize = 180;

// Test if we use cookies or not
var cookieEnabled=(navigator.cookieEnabled)? true : false

//if not IE4+ nor NS6+
if (typeof navigator.cookieEnabled=="undefined" && !cookieEnabled){ 
	document.cookie="testcookie"
	cookieEnabled=(document.cookie.indexOf("testcookie")!=-1)? true : false
}

// alert("fontsize = " + fontsize);
if (cookieEnabled) {
	if (get_cookie("fontSize")!="") {
		var fontsize = get_cookie("fontSize");
	}
}

if (typeof fontsize=="undefined") {
	var fontsize = minsize;
}

function setfontsize(fontsize) {
	//document.body.style.fontSize = "100%";
	//alert(fontsize);
	
	// var body = document.getElementById("debut");
	
	var body = document.getElementsByTagName("body").item(0);

	document.body.style.fontSize = "" + fontsize + "%";
	if (cookieEnabled) {
		document.cookie = "fontSize=" + fontsize + ";path=/;";
	}
	
	switch(fontsize)
	{
		case 100:
		    idItem = "bt-petit";
		   break;
		case 110:
		    idItem = "bt-moyen";
		   break;
		case 120:
		    idItem = "bt-gros";
		    break;
		default:
		    //Instruction_par_défaut
		   break;

	}
	element = document.getElementById(idItem);
	elements = document.getElementsByTagName("img");
	for (i=0;i<elements.length;i++) {
  		if (elements[i].className) {
  			var classes = elements[i].className.split(' ');
  			for (j=0;j<classes.length;j++)
  			{
  				if (classes[j] == "bt-police")
  				{
  					objA = chercheElementParent("a", elements[i]);	
  					elements[i].src = elements[i].src.replace("_2","_0");
  				}
  			}
  		}
  	}
  	element.src = element.src.replace("_1","_2");
  	element.src = element.src.replace("_0","_2");
}

function bigger() {
	fontsize = parseInt(fontsize) + 20;
	if (fontsize >= maxsize) {
		fontsize = maxsize;
	}
	setfontsize(fontsize);
}

function smaller() {
	fontsize = parseInt(fontsize) - 20;
	if (fontsize <= minsize) {
		fontsize = minsize;
	}
	setfontsize(fontsize);
}


function get_cookie(Name) {
	var search = Name + "="
	var returnvalue = "";
	if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search)
		// if cookie exists
		if (offset != -1) {
			offset += search.length
			// set index of beginning of value
			end = document.cookie.indexOf(";", offset);
			// set index of end of cookie value
			if (end == -1) 
				end = document.cookie.length;
			returnvalue=parseInt(unescape(document.cookie.substring(offset, end)));
		}
	}
	return returnvalue;
}