var zoom=70;
var minSize = 65;
var maxSize = 90;
var zoomValue=7;

function changeTextSize(value) {
	if(value) {
			if(zoom > minSize) {
				zoom=zoom-zoomValue;
				document.body.style.fontSize=zoom+"%";
			}
	} else {
			if(zoom < maxSize) {
				zoom=zoom+zoomValue;
				document.body.style.fontSize=zoom+"%"
			}
	}
	setMenuSelector();
}