Disable browser back button

(function (global) {

if(typeof (global) === "undefined")

{

throw new Error("window is undefined");

}

var _hash = "#";

var noBackPlease = function () {

global.location.href += "#";

// making sure we have the fruit available for juice....

// 50 milliseconds for just once do not cost much (^__^)

global.setTimeout(function () {

global.location.href += "#";

}, 50);

};

// Earlier we had setInerval here....

global.onhashchange = function () {

if (global.location.hash !== _hash) {

global.location.hash = _hash;

}

};

global.onload = function () {

noBackPlease();

// disables backspace on page except on input fields and textarea..

document.body.onkeydown = function (e) {

var elm = e.target.nodeName.toLowerCase();

if (e.which === 8 && (elm !== 'input' && elm !== 'textarea')) {

e.preventDefault();

}

// stopping event bubbling up the DOM tree..

e.stopPropagation();

};

})(window);

</script>

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