4 examples of 'back to previous page javascript' in JavaScript

240
function previousPage() {
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    if (page > 1) {
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        page--;
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        var svg;
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        if ((typeof svgs !== 'undefined') && (svgs.length > 0)) {
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            svg = svgs[page];
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        }
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        else {
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            svg = vrvToolkit.renderPage(page);                                                                          // render a page
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        }
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        document.getElementById("svg_output").innerHTML = svg;                                                          // print it
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        svgElement = document.getElementsByTagName("svg")[0];                                                           // get the svg element in the html tree
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        layoutSvg();
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        updateNavigation();
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    }
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}

13
function backToPreviousPage(e) {
14
  window.history.back();
15
}

122
previous() {
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    this.search(true);
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    return false;
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}

102
function back() {
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	document.getElementById("card-wrapper").className = "";
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	document.getElementById("c1").setAttribute("style", "");
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	push()
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}