var min=10;
var max=18;


function getElementsByClassName(oElm, strTagName, strClassName){
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	strClassName = strClassName.replace(/\-/g, "\\-");
	var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	var oElement;
	for(var i=0; i<arrElements.length; i++){
		oElement = arrElements[i];
		if(oRegExp.test(oElement.className)){
			arrReturnElements.push(oElement);
		}
	}
	return (arrReturnElements)
}

function increaseFontSize() {
   



   var d = document.getElementById('dummy').getElementsByTagName('p');
  
   for(i=0;i<d.length;i++) {
      if(d[i].style.fontSize) {
         var s = parseInt(d[i].style.fontSize.replace("px",""));
      } else {
         var s = 13;
      }
      if(s!=max) {
         s += 1;
      }
      d[i].style.fontSize = s+"px"
   }


   var p = getElementsByClassName(document, "p", "text");
  
   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 p = getElementsByClassName(document, "p", "text");
   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"
   }   

var d = document.getElementById('dummy').getElementsByTagName('p');
  
   for(i=0;i<d.length;i++) {
      if(d[i].style.fontSize) {
         var s = parseInt(d[i].style.fontSize.replace("px",""));
      } else {
         var s = 13;
      }
      if(s!=min) {
         s -= 1;
      }
      d[i].style.fontSize = s+"px"
   }


}