var content;
var eles;

function defaultFontSize() {
	if(content === undefined) {
		content = document.getElementById('contentCntr');
		eles = concat_collection(content.getElementsByTagName('p'),content.getElementsByTagName('li'));
	}
	for(i=0;i<eles.length;i++) {
      eles[i].style.fontSize = "12px"
   }
}

function smallFontSize() {
	if(content === undefined) {
		content = document.getElementById('contentCntr');
		eles = concat_collection(content.getElementsByTagName('p'),content.getElementsByTagName('li'));
	}
	
   for(i=0;i<eles.length;i++) {
      eles[i].style.fontSize = "10px"
   }
}

function largeFontSize() {
	if(content === undefined) {
		content = document.getElementById('contentCntr');
		eles = concat_collection(content.getElementsByTagName('p'),content.getElementsByTagName('li'));
	}
   for(i=0;i<eles.length;i++) {
      eles[i].style.fontSize = "14px"
   }
}

function concat_collection(obj1, obj2) {
var i;
var arr = new Array();
var len1 = obj1.length;
var len2 = obj2.length;
for (i=0; i<len1; i++) {
arr.push(obj1[i]);
}
for (i=0; i<len2; i++) {
arr.push(obj2[i]);
}
return arr;
}