var dom = document.getElementById ? true:false;

var ns = navigator.appName.indexOf("Netscape")!=-1 ? true:false;

var ns4 = document.layers ? true:false;

var ie4 = document.all ? true:false;

var mac = navigator.appVersion.indexOf('Mac')!=-1 ? true:false;



function init() {

	blurLinks();

}



function preload(imgObj,imgSrc) {

	eval(imgObj+" = new Image()");

	eval(imgObj+".src = '"+imgSrc+"'");

}



function changeImg(imgObj,imgSrc) {

	if (navigator.appVersion >= "3") {

		var imatge = eval(imgSrc+".src");

		document.images[imgObj].src = imatge;

	}

}



function blurLinks() {

	if (dom) {

		lnks = document.getElementsByTagName('a');

		for (i=0;i<lnks.length;i++) {

			lnks[i].onfocus = new Function("if(this.blur) this.blur()");

		}

	} else if (ie4) {

		for (var i in document.links) {

			document.links[i].onfocus = document.links[i].blur;

		}

	}

}



function saveCookie(name,value,days) {

	if (days) {

		var date = new Date();

		date.setTime(date.getTime()+(days*24*60*60*1000));

		var expires = "; expires="+date.toGMTString();

	} else {

		expires = "";

	}

	document.cookie = name+"="+value+expires+"; path=/";

}



function readCookie(name) {

	var nameEQ = name+"=";

	var ca = document.cookie.split(';');

	for(var i=0;i<ca.length;i++) {

		var c = ca[i];

		while (c.charAt(0)==' ') c = c.substring(1,c.length);

		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);

	}

	return null;

}



function deleteCookie(name) {

	saveCookie(name,"",-1);

}