/*
Cookie handlers
*/
function getCookie( name ) {
	var start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {
		return null;
	}
	if ( start == -1 ) return null;
	var end = document.cookie.indexOf( ";", len );
	if ( end == -1 ) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ) );
}

function setCookie( name, value, expires, path, domain, secure ) {
	var today = new Date();
	today.setTime( today.getTime() );
	if ( expires ) {
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	document.cookie = name+"="+escape( value ) +
		( ( expires ) ? ";expires="+expires_date.toGMTString() : "" ) + //expires.toGMTString()
		( ( path ) ? ";path=" + path : "" ) +
		( ( domain ) ? ";domain=" + domain : "" ) +
		( ( secure ) ? ";secure" : "" );
}

function deleteCookie( name, path, domain ) {
	if ( getCookie( name ) ) document.cookie = name + "=" +
			( ( path ) ? ";path=" + path : "") +
			( ( domain ) ? ";domain=" + domain : "" ) +
			";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

/*
Font size change function
*/
function enlarge_font(oFontSizeButton) {
	var currentSize = "";
	var newSize = "";
	
	if (document.defaultView && document.defaultView.getComputedStyle) {
		currentSize = document.defaultView.getComputedStyle(document.body, "").getPropertyValue("font-size");
	}
	else if (document.body.currentStyle) {
		currentSize = document.body.currentStyle.fontSize;
	}
	
	if (currentSize.length > 0) {
		if (currentSize.indexOf("px") > -1) {
			currentSize = currentSize.substr(0, currentSize.length - 2);
			currentSize = "" + parseInt(currentSize,10) / 0.16;
		}
		else if (currentSize.indexOf("%") > -1) {
			currentSize = currentSize.substr(0, currentSize.length - 1);
		}
		
		switch (currentSize) {
			case "62.5":
				newSize = "75%";
				//oFontSizeButton.className = "font smaller";
				break;
			default:
				newSize = "62.5%";
				//oFontSizeButton.className = "font larger";
		}
		
		setCookie("fontsize", newSize + ";" + oFontSizeButton.id + ";" + oFontSizeButton.className , 30);
		
		document.body.style.fontSize = newSize;
	}
}

function readFontSizeSetting() {
	var fontsizeFromCookie = getCookie("fontsize");
	if (fontsizeFromCookie != null) {
		var aFontSizeData = fontsizeFromCookie.split(";");
		if (aFontSizeData.length == 3) {
			document.body.style.fontSize = aFontSizeData[0];
			var oFontSizeButton = document.getElementById(aFontSizeData[1]);
			if (oFontSizeButton != null) {
				oFontSizeButton.className = aFontSizeData[2];
			}
		}
	}
}

function window_onload() {
	readFontSizeSetting();
}

window.onload = window_onload;