So if positions are not zero, we run a loop position-1 times and get a pointer to the previous node. The value of the element cannot be modified once it is added to the set, though it is possible to remove and add the modified value of that element. But, in any case you delete an individual marker by looping over your layer groups to find and delete it. How to add custom code to a rich text element. Figure 1: List products by adding rows to a table when the page loads. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. It is highly customizable and is pluggable to many jQuery widgets like autocompleters, sliders and datepickers. Using unset() Function: The unset() function is used to remove element from the array. At the bottom of this HTML page, I created a