var min=11;
var max=20;
function increaseFontSize() {
   var p = document.getElementsByTagName('span');
   for(i=5;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      
      } else {
         var s = 12;
      }
      if(s!=max) {
         s += 1;
      }
      p[i].style.fontSize = s+"px"
   }
}
function decreaseFontSize() {
   var p = document.getElementsByTagName('span');
   for(i=5;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=min) {
         s -= 1;
      }
      p[i].style.fontSize = s+"px"
   } 
}

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 showDescription(rowNo)
  {
     if(document.getElementById || document.all)
     {
        var descriptionNo = 'box' + rowNo;
        var HiddendescriptionNo = 'hidden_box' + rowNo;

       if(document.getElementById(descriptionNo).style.display == 'none')
       {
         document.getElementById(descriptionNo).style.display = 'block';
         document.getElementById(HiddendescriptionNo).style.display = 'none';
         createCookie('visbox'+rowNo, 'block', 365);
       }
       else if(document.getElementById(descriptionNo).style.display == 'block')
       {
         document.getElementById(descriptionNo).style.display = 'none';
         document.getElementById(HiddendescriptionNo).style.display = 'block';
         createCookie('visbox'+rowNo, 'none', 365);
       }
     }
  }