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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
function set_font_size(fontType) {
        if (fontType == "increase") {
            if (fontSize < 100) {
                fontSize = parseInt(fontSize) + 15;
        } else {
            fontSize = 75;
      document.getElementById("sitebody1").style.fontSize = fontSize + "%";

<body id="sitebody1">
of a button
Tags: Javascript, ASP.NET


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