To merge table columns in HTML use the colspan attribute in tag. With this, merge cells with each other. For example, if your table is having 4 rows and 4 columns, then with colspan attribute, you can easily merge 2 or even 3 of the table cells.ExampleYou can try to run the following code to merge table column in HTML. Firstly, we will see how to create a table in HTML with 3 rows and 3 columns                    table, th, td {             border: ... Read More

To create a session only cookie, you need to set the expiration date of the cookie to be some years ahead. You need to set the expire attribute −current time + 5 yearsThe expire attribute shows the date the cookie will expire. If this is blank, the cookie will expire when the visitor quits the browser.Note − Do not consider removing the expire value to create a session only cookie. This won’t work. Set the expire attribute to the future date.

In JavaScript, the NaN property is a special value that represents "Not a Number". It is a property of the Number object and can be accessed using Number.NaN. The NaN property is usually produced as a result of an operation that cannot produce a meaningful result. For example, dividing 0 by 0 or trying to parse an invalid number will both produce NaN. Here are a few examples of operations that will produce NaN − Math.sqrt(-1); // NaN 0/0; // NaN parseInt("foo"); // NaN It ... Read More

To store large values in JavaScript cookies, try the following possibilities −Create a "session id" and save the settings in a database. Then store the session id in the cookie.Store the indexes of the selected items. Let’s say the selected items are the first 20 items on the list −P[0,19]Create a table to store cookies data such as −[ data_id , data , data_create , date_expire ]Store data_id in a table and when a user visits, get the data_id in cookies.

We use the colspan and rowspan attribute, to merge cells in HTML. The rowspan attribute is for the number of rows a cell should merge, whereas the colspan attribute is for the number of columns a cell should merge. The attribute should be placed inside the tag. Syntax Following is the syntax to merge table cells in HTML. cell data Example Following is the example program to merge the row cells of the table in HTML. DOCTYPE html> table, tr, th, td { ... Read More

While creating a cookie, use the “path” parameter. The path to the directory or web page set the cookie. This may be blank if you want to retrieve the cookie from the current page. By default, the cookie belongs to the current page.ExampleTo list all cookies for the current page, try the following code −Live Demo                    function ReadCookie() {             var allcookies = document.cookie;             document.write ("All Cookies : " + allcookies );             // Get all the cookies pairs in an array             cookiearray = allcookies.split(';');             // Now take key value pair out of this array             for(var i=0; i

To create a domain-based cookie, set the domain and path attribute on your cookie, like −domain=.example.comExampleYou can try to run the following code to learn how to create domain-based cookies −Live Demo                                                  Enter name:                    

We use the inline CSS style, to set the cell width and height. The HTML style element contains width and height attributes. To set cell width and height we should place these attributes with specified values with pixels inside the tag. Syntax Following is the syntax to set cell width and height in HTML. content Example Following is the example program to set cell width and height in HTML. DOCTYPE html> table, tr, th, td { border:1px solid ... Read More

To set cookies for multiple pages, you need to set the path as −;path=/ExampleThe above will make your cookies to site cookie. You can try to run the following code to set cookies for multiple pages −Live Demo                                                  Enter name:                    

The largest possible value a number in JavaScript can have 1.7976931348623157E+308. The Number.MAX_VALUE property belongs to the static Number object. It represents constants for the largest possible positive numbers that JavaScript can work with.ExampleYou can try to run the following code to get the maximum value represented by Number object −Live Demo                                         Click the following to see the result: