var min=1;
var max=100;

/*INCREASE TEXT SIZE*/

function increaseFontSize() {
   
   /*Increase for Paragraph 'p' tags*/   
   var p = document.getElementsByTagName('p');
   for(i=0;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"
   }
   
      /*Increase for Paragraph 'ul' tags*/   
   var ul = document.getElementsByTagName('ul');
   for(i=0;i<ul.length;i++) {
      if(ul[i].style.fontSize) {
         var s = parseInt(ul[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=max) {
         s += 1;
      }
      ul[i].style.fontSize = s+"px"
   }
   
         /*Increase for Paragraph 'ol' tags*/   
   var ol = document.getElementsByTagName('ol');
   for(i=0;i<ol.length;i++) {
      if(ol[i].style.fontSize) {
         var s = parseInt(ol[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=max) {
         s += 1;
      }
      ol[i].style.fontSize = s+"px"
   }
}

/*DECREASE TEXT SIZE*/

function decreaseFontSize() {
	
   /*Decrease for Paragraph 'p' tags*/
   var p = document.getElementsByTagName('p');
   for(i=0;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"
   }
   
   /*Decrease for Paragraph 'ul' tags*/
   var ul = document.getElementsByTagName('ul');
   for(i=0;i<ul.length;i++) {
      if(ul[i].style.fontSize) {
         var s = parseInt(ul[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=min) {
         s -= 1;
      }
      ul[i].style.fontSize = s+"px"
   } 
   
      /*Decrease for Paragraph 'ol' tags*/
   var ol = document.getElementsByTagName('ol');
   for(i=0;i<ol.length;i++) {
      if(ol[i].style.fontSize) {
         var s = parseInt(ol[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=min) {
         s -= 1;
      }
      ol[i].style.fontSize = s+"px"
   } 
}