Thread: Element Reference by Id Variable - JQuery

Element Reference by Id Variable - JQuery

If you need to get a reference to an element by a passed id variable, you could do that by
$("#"+variablename)

In this example below we set the class of an element in a function which recieves the id of element as a variable.

Code:

function SetClass(elementId)
{  
$("#"+elementId.addClass("myNewClass");
}

It is always best practice to include context with jQuery. This means calling the element (which you can do using ID).

Code:

$('#obj_id', '#obj_parent_id')

This can really speed things up since it lessens the amount of the DOM tree javascript needs to search through.