/* for stylesheet change ------------------------------------------------------*/



function setActiveStyleSheet(title) {

	var i, a, main;

	if ( title == '' || title == null ) {

		title = 'standard';

	}

	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {

		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {

			a.disabled = true;

			if(a.getAttribute("title") == title) a.disabled = false;

		}

	}

}



function getActiveStyleSheet() {

	var i, a;

	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {

		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");

	}

	return null;

}



function getPreferredStyleSheet() {

	var i, a;

	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {

		if(a.getAttribute("rel").indexOf("style") != -1

			&& a.getAttribute("rel").indexOf("alt") == -1

			&& a.getAttribute("title")

			) return a.getAttribute("title");

	}

	return null;

}



function createCookie(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;

}



/* for fontsize change --------------------------------------------------------*/



function change_size( ratio ) {

	if ( 40 < parseInt( def_size ) && parseInt( ratio ) < 0 ) {

		def_size = parseInt( def_size ) + parseInt( ratio );

	}

	if ( 0 < parseInt( ratio ) && parseInt( def_size ) < 250 ) {

		def_size = parseInt( def_size ) + parseInt( ratio );

	}

	document.body.style.fontSize = def_size + '%';

}



/* for event ------------------------------------------------------------------*/



var cookie;

var title;

var def_size;

var ratio;



window.onload = function(e) {

	cookie   = readCookie("fontSize");

	def_size = cookie ? cookie : 100;

	change_size ( 0 );

	cookie    = readCookie("style");

	title = cookie ? cookie : 'standard';

	setActiveStyleSheet(title);

}



window.onunload = function(e) {

	title = getActiveStyleSheet();

	createCookie("style", title, 365);

	createCookie("fontSize", def_size, 365);

}