var tags = new Array( 'div','td','tr','p','b','table','strong','emphasis','a','h1','h2','h3','pre','sub','sup','i','th','cp','ul','ol','li','dt','dd');
var pixelArray =  new Array('13','14','15','16','17','20','25');
var emArray =  new Array('0.7','0.9','1.0','1.5','2.0','2.5','3');
var initSize = 0;

function fontSizer(inc,unit) {
        if (!document.getElementById) return;
        var size = initSize;
        size += inc;
        if (size < 0 ) size = 0;
        if (size > 6 ) size = 6;

    initSize = size;
        getBody = document.getElementById('ArtSec');
        for (i = 0 ; i < tags.length ; i++ ) {
                getallTags = getBody.getElementsByTagName(tags[i]);
                for (k = 0 ; k < getallTags.length ; k++)
                        getallTags[k].style.fontSize = (unit=='px') ? pixelArray[size]+unit: emArray[size]+unit;
        }
}