/*
 *      fontsize.js
 *      
 *      Copyright 2010 Daniel Mundt <daniel.mundt@loko-media.com>
 *      
 *      This script contains functions to increase or decrease the fontsize on

 *      div#f_left.
 */

// define public variables

var domCenterFrame = "f_left";

var unit = "%";

var fz_interval = 5;

var fz_default = 100;

var fz_current = fz_default;



//browser switch DOM

function browserswitch(getDiv){

  var okDom;

  if(document.all){

    okDom = document.all[getDiv];

  }else{

    okDom = document.getElementById(getDiv);

  }

  return okDom;

}



//function increase fontsize

function fzPlus(){

  var okDomCenterFrame = browserswitch(domCenterFrame);

  

  if(fz_current < 126){

    fz_current = fz_current + fz_interval;   

    okDomCenterFrame.style.fontSize = fz_current + unit;

  }

}



//function decrease fontsize

function fzMinus(){

  var okDomCenterFrame = browserswitch(domCenterFrame);

  

  if(fz_current > fz_default){

    fz_current = fz_current - fz_interval;    

    okDomCenterFrame.style.fontSize = fz_current + unit;

  }

}



//function set default

function fz0(){

  var okDomCenterFrame = browserswitch(domCenterFrame);

   

  fz_current = fz_default;  

  okDomCenterFrame.style.fontSize = fz_current + unit;

}