function increaseText(id){
def = 1;
max = 1.3;
ext ="em";
change = .1;
element = document.getElementById(id).style; 
if (element.fontSize == "") element.fontSize = def+ext; 
currsize = parseFloat(element.fontSize); 
if (currsize <= max)
element.fontSize = (currsize+change)+ext;
}
function decreaseText(id){
def = 1;
min = .8;
ext ="em";
change = .1;
element = document.getElementById(id).style; 
if (element.fontSize == "") element.fontSize = def+ext; 
currsize = parseFloat(element.fontSize); 
if (currsize >= min)
element.fontSize = (currsize-change)+ext;
}