https://www.tattvagyan.com/wp-content/plugins/font-resizer/js/jquery.fontsize.js?ver=3.6.1

1jQuery.fn.fontresizermanager = function () {
2    var fontResizer_value = jQuery('#fontResizer_value').val();
3    var fontResizer_ownid = jQuery('#fontResizer_ownid').val();
4    var fontResizer_ownelement = jQuery('#fontResizer_ownelement').val();
5    var fontResizer_resizeSteps = jQuery('#fontResizer_resizeSteps').val();
6    var fontResizer_cookieTime = jQuery('#fontResizer_cookieTime').val();
7    var fontResizer_element = fontResizer_value;
8	if(fontResizer_value == "innerbody") {
9		fontResizer_element = "div#innerbody";
10	} else if(fontResizer_value == "ownid") {
11		fontResizer_element = "div#" + fontResizer_ownid;
12	} else if(fontResizer_value == "ownelement") {
13		fontResizer_element = fontResizer_ownelement;
14	}
15	var startFontSize = parseFloat(jQuery(fontResizer_element+"").css("font-size"));
16	var savedSize = jQuery.cookie('fontSize');
17	if(savedSize > 4) {
18		jQuery(fontResizer_element).css("font-size", savedSize + "px");
19	}
20	jQuery('.fontResizer_add').css("cursor","pointer");
21	jQuery('.fontResizer_minus').css("cursor","pointer");
22	jQuery('.fontResizer_reset').css("cursor","pointer");
23	jQuery('.fontResizer_add').click(function() {
24		var newFontSize = parseFloat(jQuery(fontResizer_element+"").css("font-size"));
25		newFontSize=newFontSize+parseFloat(fontResizer_resizeSteps);
26		jQuery(fontResizer_element+"").css("font-size",newFontSize+"px");
27		jQuery.cookie('fontSize', newFontSize, {expires: parseInt(fontResizer_cookieTime), path: '/'});
28	});
29	jQuery('.fontResizer_minus').click(function() {
30		var newFontSize = parseFloat(jQuery(fontResizer_element+"").css("font-size"))
31		newFontSize=newFontSize-fontResizer_resizeSteps;
32		jQuery(""+fontResizer_element+"").css("font-size",newFontSize+"px");			 
33		jQuery.cookie('fontSize', newFontSize, {expires: parseInt(fontResizer_cookieTime), path: '/'});
34	});
35	jQuery('.fontResizer_reset').click(function() {
36		jQuery(""+fontResizer_element+"").css("font-size",startFontSize);			 
37		jQuery.cookie('fontSize', startFontSize, {expires: parseInt(fontResizer_cookieTime), path: '/'});
38	});
39}