function incFontSize()
{

  fsize = getStyle('fontSize') || getStyle('font-size');

  if(fsize.indexOf('%') != -1)
    newFsize = (parseInt(fsize) + 10) + '%'; 
  else if(fsize.indexOf('em') != -1)
    newFsize = (parseFloat(fsize) + 0.1) + 'em';
  else
    newFsize = (parseInt(fsize) + 2) + 'px';

  //document.body.style.fontSize = newFsize;
  //var element01 = document.getElementById("rightColumn");
  //document.getElementById("mainContent").style.fontSize = newFsize;
  setFontSize(newFsize,'mainContent');

}

function decFontSize()
{
  //alert(getStyle('fontSize'));
  fsize = getStyle('fontSize') || getStyle('font-size');

  //if((parseInt(fsize) - 10) <= 5 ) return 0;
  if(fsize.indexOf('%') != -1)
    newFsize = (parseInt(fsize) - 10) + '%'; 
  else if(fsize.indexOf('em') != -1) {
   // num=fsize.substr(0,(fsize.length-2));
    newFsize = ((parseFloat(fsize) - 0.1)  )+ 'em';
  }
  else
    newFsize = (parseInt(fsize) - 2) + 'px';

  if (parseFloat(newFsize )>0){
	  //document.getElementById("mainContent").style.fontSize = newFsize;	  
	  setFontSize(newFsize,'mainContent');
  }
 
}

function setFontSize(textsize,id){
  var vfontsize = document.getElementById(id);
  if(vfontsize){
    vfontsize.style.fontSize = textsize;
    createCookie("textsizestyle", textsize, 365);
  }
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else var expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}
 
function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

function getStyle(styleProp) 
{ 
   var x = document.getElementById("mainContent"); 
   if (x.currentStyle) 
      var y = x.currentStyle[styleProp]; 
   else if (window.getComputedStyle) 
      var y = document.defaultView.getComputedStyle(x,null).getPropertyValue(styleProp); 
   return y; 
}