var blogLetterSize=0;
var smallLet1=new Image();smallLet1.src='img/blog/small1.gif';
var mediumLet1=new Image();mediumLet1.src='img/blog/medium1.gif';
var largeLet1=new Image();largeLet1.src='img/blog/large1.gif';
var smallLet2=new Image();smallLet2.src='img/blog/small2.gif';
var mediumLet2=new Image();mediumLet2.src='img/blog/medium2.gif';
var largeLet2=new Image();largeLet2.src='img/blog/large2.gif';
var http_letter=false;
function setBlogLetterSize(obj,newSize){
	if(newBlogLetterSize!==undefined){blogLetterSize=newBlogLetterSize;newBlogLetterSize=undefined};
	if(newSize<0||newSize>2||newSize==blogLetterSize)return;
	blogLetterSize=newSize;
	var s=$('small_let_img'),m=$('med_let_img'),l=$('large_let_img');
	if(s)s.src=smallLet2.src;
	if(m)m.src=mediumLet2.src;
	if(l)l.src=largeLet2.src;
	var p=obj.parentNode.parentNode.parentNode;
	switch(newSize){
		case 0:obj.src=smallLet1.src;lettersToSize(p,'_big','_large','');break;
		case 1:obj.src=mediumLet1.src;lettersToSize(p,'','_large','_big');break;
		case 2:obj.src=largeLet1.src;lettersToSize(p,'_big','','_large');break;
	}
	sendAjaxLetter('forms/ajaxsetletter.php','size='+newSize,function(){});
}
function $(o){return document.getElementById(o);}

function lettersToSize(obj,or1,or2,to){
	if(obj.className&&(obj.className=='content_blogmodul_title'+or1||obj.className=='content_blogmodul_title'+or2))
		obj.className='content_blogmodul_title'+to;
	if(obj.className&&(obj.className=='content_blogmodul_subtitle'+or1||obj.className=='content_blogmodul_subtitle'+or2))
		obj.className='content_blogmodul_subtitle'+to;
	if(obj.className&&(obj.className=='content_blogmodul_subtitle_min'+or1||obj.className=='content_blogmodul_subtitle_min'+or2))
		obj.className='content_blogmodul_subtitle_min'+to;
	if(obj.className&&(obj.className=='content_blogmodul_author'+or1||obj.className=='content_blogmodul_author'+or2))
		obj.className='content_blogmodul_author'+to;
	if(obj.className&&(obj.className=='content_blogmodul_date'+or1||obj.className=='content_blogmodul_date'+or2))
		obj.className='content_blogmodul_date'+to;
	if(obj.className&&(obj.className=='content_blogmodul_maintext'+or1||obj.className=='content_blogmodul_maintext'+or2))
		obj.className='content_blogmodul_maintext'+to;
	if(obj.className&&(obj.className=='content_blogmodul'+or1||obj.className=='content_blogmodul'+or2))
		obj.className='content_blogmodul'+to;
	if(obj.childNodes&&obj.childNodes.length>0)	{
		for(var i in obj.childNodes)lettersToSize(obj.childNodes[i],or1,or2,to);
	}
}

function sendAjaxLetter(url,params,cb){
	http_letter = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_letter = new XMLHttpRequest();
		if (http_letter.overrideMimeType) {
			http_letter.overrideMimeType('text/html');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_letter = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_letter = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_letter) {
		alert('Cannot create XMLHTTP instance');
		return false;
	}
	http_letter.onreadystatechange = cb;
	http_letter.open('POST', url, true);
	http_letter.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http_letter.setRequestHeader("Content-length", params.length);
	http_letter.setRequestHeader("Connection", "close");
	http_letter.send(params);
}