function increaseFontSize() {
	var p = document.getElementsByTagName(textTag);
	for(i=0;i<p.length;i++) {
		if(p[i].style.fontSize) {
			var s = parseInt(p[i].style.fontSize.replace("px",""));
		} else {
			var s = reset;
		}
		if(s+resize<=max) {
			s += resize;
		}
		p[i].style.fontSize = s+"px"
	}
}

function decreaseFontSize() {
	var p = document.getElementsByTagName(textTag);
	for(i=0;i<p.length;i++) {
		if(p[i].style.fontSize) {
			var s = parseInt(p[i].style.fontSize.replace("px",""));
		} else {
			var s = reset;
		}
		if(s-resize>=min) {
			s -= resize;
		}
		p[i].style.fontSize = s+"px"
	}
}

function resetFontSize(){
	var p = document.getElementsByTagName(textTag);
	for(i=0;i<p.length;i++) {
		p[i].style.fontSize = reset+"px"
	}
}