// JavaScript Document

var min = 8;
var max = 18;


var textSize = 12;
var headerSize = 14;

function increaseFontSize() {
	
	var text = document.getElementById('main_text');
	var header = document.getElementById('page_title');
	
	if (textSize != max) {
	 textSize = textSize+2;
	}
	
	if (headerSize != (max+2)) {
	 headerSize = headerSize+2;
	}
	
	text.style.fontSize = textSize+"px";
	header.style.fontSize = headerSize+"px";
	
	   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"
   }
	
}

function decreaseFontSize() {
	
	var text = document.getElementById('main_text');
	var header = document.getElementById('page_title');
	
	if (textSize != min) {
	 textSize = textSize-2;
	}	
	
	if (headerSize != (min+2)) {
	 headerSize = headerSize-2;
	}
	
	text.style.fontSize = textSize+"px";
	header.style.fontSize = headerSize+"px";
	
	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"
   }   
}