function increaseTextSize() {
	var max = 26;

	if (document.body.style.fontSize == "") {
		document.body.style.fontSize = "14px";
		document.body.style.lineHeight = "19px";
	}	

	var newsize = parseFloat(document.body.style.fontSize) + 4;
	
	if(newsize <= max) {
		document.body.style.fontSize = newsize + "px";
		var newheight = parseFloat(document.body.style.lineHeight) + 3;
		document.body.style.lineHeight = newheight + "px";		
	}
}

function decreaseTextSize() {
	var min = 10;
	
	if (document.body.style.fontSize == "") {
		document.body.style.fontSize = "14px";
		document.body.style.lineHeight = "19px";
	}	

	var newsize = parseFloat(document.body.style.fontSize) - 4;
	
	if(newsize >= min) {
		document.body.style.fontSize = newsize + "px";
		var newheight = parseFloat(document.body.style.lineHeight) - 3;
		document.body.style.lineHeight = newheight + "px";
	}
}