// JavaScript Document
function changeFontSize(idName,sizeName,imgID) {
	initFontimg();
	if (document.all && !document.getElementById) {
		document.all[idName].className = sizeName;
		document.all[imgID].src = "/Postwrite/images/" + imgID + "_on.gif";
	} else {
		document.getElementById(idName).className = sizeName;
		document.getElementById(imgID).src = "/Postwrite/images/" + imgID + "_on.gif";
	}
	CNA2007delCookie("ViewFontSize");
	CNA2007setCookie("ViewFontSize",sizeName);
}

function CNA2007getCookie(name) 
{
	var cookiename = name + "=";
	var dc = document.cookie+";";

	if (dc.length>0)
	{
		var begin = dc.indexOf(cookiename);
		if (begin != -1)
		{
			begin += cookiename.length;
			var end = dc.indexOf(";" , begin);
			if (end != -1)
			{
				//end = dc.length;
				return unescape(dc.substring(begin,end));
			}
			
		}
	}
	return null;
}

function CNA2007setCookie(name, value, expires)
{
/*
if (navigator.cookieEnabled) alert("可寫入cookie");
else alert("寫入cookie錯誤");
*/
	var setDay = new Date();
	if (expires == null) {
		//預設一年時效
		setDay.setTime(setDay.getTime() + (365*24*60*60*1000));
		var expDate = setDay.toGMTString();
	}
	document.cookie = name + "=" + escape(value) + "; path=/" + ((expires == null) ? "; expires=" + expDate : "; expires=" + expires.toGMTString());
	//document.cookie = name + "=" + escape(value) + "; path=/" + ((expires == null) ? " " : "; expires=" + expires.toGMTString())+";domain="+domain+";";
}

function CNA2007delCookie(name)
{
	document.cookie = name + "=;expires=Thu, 01-Jan-70 00:00:01 GMT" + ";path=/";
}

function imgName(tmp)
{
	switch(tmp.toLowerCase()) {
		case "sfont-txtcont": return "fontsize_1";break;
		case "mfont-txtcont": return "fontsize_2";break;
		case "lfont-txtcont": return "fontsize_3";break;
		default: return null;break;
	}
}

function initFontimg() {
	if (document.all && !document.getElementById) {
	    document.all["fontsize_1"].src = "/Postwrite/images/fontsize_1_off.gif";
	    document.all["fontsize_2"].src = "/Postwrite/images/fontsize_2_off.gif";
	    document.all["fontsize_3"].src = "/Postwrite/images/fontsize_3_off.gif";	
	} else {
	    document.getElementById("fontsize_1").src = "/Postwrite/images/fontsize_1_off.gif";
	    document.getElementById("fontsize_2").src = "/Postwrite/images/fontsize_2_off.gif";
	    document.getElementById("fontsize_3").src = "/Postwrite/images/fontsize_3_off.gif";	
	}
}