/**
 * @author Carola Alriksson
 * @date 2008-11-30
 * see original script at: http://davidwalsh.name/change-text-size-onclick-with-javascript
 */

function resizeText(multiplier) 
{  
  if (document.body.style.fontSize == "") 
  {  
    document.body.style.fontSize = "60%";  
  }  
  document.body.style.fontSize = parseFloat(document.body.style.fontSize) + (multiplier * 10) + "%";  
}