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function shareOnFacebookButton() {
      var dynamicUrl = "https://www.facebook.com/sharer/sharer.php"
                        + "?"
                        + "u=" + window.location.href; 
                        
      var fbButton = document.createElement("a");
      fbButton.id = "facebook-url";
      fbButton.href = dynamicUrl;
      fbButton.innerText = "Share on Facebook";
      document.body.appendChild(fbButton);

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function createXMLHttpRequest() {
	var xhr = new XMLHttpRequest();
	xhr.open("GET", "url"); // Method GET or POST
	xhr.onload = function(e) {
		console.log(xhr.responseText);
	};
	xhr.send();
}

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function secondsToTime(secs)
{
	var hours = Math.floor(secs / (60 * 60));
	
	var divisor_for_minutes = secs % (60 * 60);
	var minutes = Math.floor(divisor_for_minutes / 60);

	var divisor_for_seconds = divisor_for_minutes % 60;
	var seconds = Math.ceil(divisor_for_seconds);
	

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/*
 * This functions needs JQuery and Three DOM objects
 * with id minutes, seconds and hours.
 */
function progresiveCounter() {
	var seconds = 0;
	var minutes = 0;
	var hours = 0;

	var strSeconds = "";

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function webViewExecuteCode() {
	webview.executeScript({ code: "document.body.style.backgroundColor = 'red'" });
}

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setInterval(function() {
	// Execute ever single second.
}, 1000);

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setTimeout(function() {
	// Wait until 1 second to execute this.
}, 1000);

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JSON.stringify(jsonObject);

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JSON.parse(stringValue);

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#idOfTheDiv {
   width: 400px; /* here you put the width that you need */
   height: 200px; /* here you put the height that you need */
   position:absolute;
   left:50%;
   top:50%;
   margin-left:-200px; /* this number always to be the width divided two in negative */
   margin-top:-100px; /* this number always to be the height divided two in negative */
}