// This Javascript is written by Peter Velichkov (http://blog.creonfx.com)
// and is distributed under the following license : http://creativecommons.org/licenses/by-sa/3.0/
// Use and modify all you want just keep this comment. Thanks

var incdec = 0;
var headID = document.getElementsByTagName("head")[0];
var cssNode = document.createElement("style");
cssNode.type = 'text/css';
cssNode.id="resizingText";

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 var 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 eraseCookie(name) {
    createCookie(name,"",-1);
}

function loadCss(x){
    try{
        var cssStr = '\
        .resizable-text {font-size:' + (12+x) +'px;}\
        ';
        if(cssNode.styleSheet){
            cssNode.styleSheet.cssText = cssStr; // for IE
        } else {
            var cssText = document.createTextNode(cssStr);
            cssNode.appendChild(cssText); // breaks ie
            //cssNode.innerHTML = cssStr; // breaks saffari
        }
        if(!document.getElementById("resizingText"))headID.appendChild(cssNode);
    }catch(err){ 
        // some debugging code
    }
}

function increaseFontSize() {
    if(incdec < 3){
        incdec++;
        loadCss(incdec);
        createCookie('textsize',incdec,1); 
    }
}

function decreaseFontSize() {
    if(incdec > 0){
        incdec--;
        loadCss(incdec);
        createCookie('textsize',incdec,1); 
    }       
}

function changeFontSize(fontSz) {
	switch(fontSz) {
		case 1:
			//small (10px)
			incdec = -2;
			break;
		case 2:
			//2 = medium (12px)
			incdec = 0;
			break;
		case 3:
			//3 = large (14px)
			incdec = 2;
			break;
		default:
			incdec = 0;
	}

	loadCss(incdec);
	createCookie('textsize',incdec,1); 
}

var x = readCookie('textsize')
if (x && x!=0) {
    x = parseInt(x);
    incdec = x;
    loadCss(x);
}

//eraseCookie('textsize');