var currentsize = 2;

function fontresize(resizer, defsize) {
    if (!document.getElementById) return;
    if (resizer == 0) {
	  currentsize = defsize;
    } else if (resizer == 1) {
      if (currentsize < 6) currentsize += 1;
    } else if (resizer == -1) {
      if (currentsize>0) currentsize -= 1;
    }
    var taglist = new Array( 'div','table','tr','td','p','a','span', 'h2');
    //var taglist = new Array( 'p');
    var i;
    var j;
    var docTags;
    var sizeArray = new Array('xx-small','x-small','small','medium','large','x-large','xx-large');

    for (i=0; i<taglist.length; i++) {
        docTags = document.getElementById('conteudo').getElementsByTagName(taglist[i]);
        for (j=0; j<docTags.length; j++) {
            docTags[j].style.fontSize =  sizeArray[currentsize];
        }
    }	
}