var min = 8;
var max = 24;
function increaseFontSize() {
    $('#_ctl0_PlMainMiddle_dvPagesContent a , #_ctl0_PlMainMiddle_dvPagesContent font , #_ctl0_PlMainMiddle_dvPagesContent td , #_ctl0_PlMainMiddle_dvPagesContent div').each(function() {
        var currentFSize = $(this).css("font-size");
        var currentLineH = $(this).css("line-height");
        currentLineH = currentLineH.replace("px", "");
        currentFSize = currentFSize.replace("px", "");

        if (currentLineH == "normal") {
            currentLineH = currentFSize * 1.11;
        }

        var newSize = parseFloat(currentFSize) * 1.2;
        var newLineH = parseFloat(currentLineH) * 1.05;
        if (newSize < max) {
            $(this).css("font-size", newSize + "px");
            $(this).css("line-height", newLineH + "px");
        }
    });
}
function decreaseFontSize() {
    $('#_ctl0_PlMainMiddle_dvPagesContent a , #_ctl0_PlMainMiddle_dvPagesContent font , #_ctl0_PlMainMiddle_dvPagesContent td , #_ctl0_PlMainMiddle_dvPagesContent div').each(function() {
        var currentFSize = $(this).css("font-size");
        var currentLineH = $(this).css("line-height");
        currentLineH = currentLineH.replace("px", "");
        currentFSize = currentFSize.replace("px", "");

        if (currentLineH == "normal") {
            currentLineH = currentFSize * 1.11;
        }
        
        var newSize = parseFloat(currentFSize) * 0.8;
        var newLineH = parseFloat(currentLineH) * 0.95;
        if (newSize > min) {
            $(this).css("font-size", newSize + "px");
            $(this).css("line-height", newLineH + "px");
        }
    });
}