In JavaScript you can use a built-in method to format a decimal number so that it is displayed using, at most, x decimal places. Here is an example:
var num = 3.1356; var x = 3; alert(num.toFixed(x)); // displays 3.136 As you may have guessed the method is toFixed. It accepts one parameter which is the number of decimal places to take into account.
Note: The number gets rounded as you can notice by the example above.
Sometimes you might need to display an element, for example a div, to the center of the browser. Here is an example of how you can do it using JavaScript and CSS.
function init() { // Reference to the element var loading = document.getElementById("loading"); // The div's width, set within the CSS class var loadingWidth = loading.offsetWidth; // The div's width, set within the CSS class var loadingHeight = loading.offsetHeight; // The browser's body's width var documentWidth = document.
Here is an example of how you can retrieve the selected checkboxes using a JavaScript function:
<html> <head> <script> function getSelectedValues(elem) { var elemNumber = document.myForm.test.length; var selectedElems = []; for(j = 0; j < elemNumber; j++) { if(elem[j].checked) { selectedElems.push(elem[j].value); } } return selectedElems; } </script> </head> <body> <form id="myForm" name="myForm"> <input type="checkbox" id="test" name="myCheckBox" value="test1"> Test 1 <input type="checkbox" id="test" name="myCheckBox" value="test2"> Test 2 <input type="button" value="Click Here" onclick="alert(getSelectedValues(document.