document.getElementById('newsContent').changeFontSize = function(size){
    if(!getCookie('fontSize') || getCookie('fontSize')!=size){
        setCookie('fontSize', size, '', '/', '', '');
    }else{
        size = getCookie('fontSize');
    }

    var small  = '13px';
    var medium = '16px';
    var large  = '18px';
    var fontSize = null;

    switch(size){
        case 'small':
            fontSize = small;
            break;
        case 'medium':
            fontSize = medium;
            break;
        case 'big':
            fontSize = large;
            break;
        default :
            fontSize = medium;
            break;
    }
    this.style.fontSize = fontSize;
};

objects = document.getElementsByName('changeFontSize');
for(objIndex = 0; objIndex < objects.length; objIndex++){
    objects[objIndex].onclick = function(){
        var objs = document.getElementsByName('changeFontSize');
        var size = this.id.substr(this.name.length).toLowerCase();
        var sizeAry = ['Small','Medium','Big'];
        var imgObj = null;
        var imgSrc = '';
        for(sizeIdx = 0; sizeIdx < sizeAry.length; sizeIdx++){
            if(size == sizeAry[sizeIdx].toLowerCase()){
                imgSrc = sizeAry[sizeIdx].substring(0,1).toLowerCase() + '-1.gif';
            }else{
                imgSrc = sizeAry[sizeIdx].substring(0,1).toLowerCase() + '.gif';
            }
            imgObj = document.getElementById('changeFontSize' + sizeAry[sizeIdx]);
            imgObj.src = imgObj.src.replace(/[s,m,b](-1){0,1}.gif/, imgSrc);
        }
        document.getElementById('newsContent').changeFontSize(size);
    };
}

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();
    var expires_date
    today.setTime( today.getTime() );
    if ( expires ) {
        expires = expires * 1000 * 60 * 60 * 24;
        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';
    }
}

window.onload = function(){
    var size = 'medium';
    if(!getCookie('fontSize')){
        setCookie('fontSize', size, '', '/', '', '');
    }else{
        size = getCookie('fontSize');
    }

    var objs = document.getElementsByName('changeFontSize');
    var sizeAry = ['Small','Medium','Big'];
    var imgObj = null;
    var imgSrc = '';
    for(sizeIdx = 0; sizeIdx < sizeAry.length; sizeIdx++){
        if(size == sizeAry[sizeIdx].toLowerCase()){
            imgSrc = sizeAry[sizeIdx].substring(0,1).toLowerCase() + '-1.gif';
        }else{
            imgSrc = sizeAry[sizeIdx].substring(0,1).toLowerCase() + '.gif';
        }
        imgObj = document.getElementById('changeFontSize' + sizeAry[sizeIdx]);
        imgObj.src = imgObj.src.replace(/[s,m,b](-1){0,1}.gif/, imgSrc);
    }
    document.getElementById('newsContent').changeFontSize(size);
}