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How to increase content page font size with master page font size

Member 8232678 asked:

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Hello All,
i have a master page and master page body id= "sitebody1" and on clicking a button i am increasing the font size by javascript function.
The font size of master page contents are increasing but content page font size is not increased.
following is sample code
Jacascript
function set_font_size(fontType) {
        if (fontType == "increase") {
            if (fontSize < 100) {
                fontSize = parseInt(fontSize) + 15;
            }
        } else {
            fontSize = 75;
        }
      document.getElementById("sitebody1").style.fontSize = fontSize + "%";

Design
<body id="sitebody1">
 onclick="set_font_size('increase')
of a button
Tags: Javascript, ASP.NET

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