jQuery
$('CSS selector')$('#firstline') to get id of
'firstline'.$('li')[0] first element. $('#firstline').html('Hello') to set the contents. $('li.summary') li tags with summary class.$('p:even') even paragraphs $('tr:nth-child(1)') first row of each
table$('a[href$=pdf') links to pdf files $('#orderedlist > li') all li children of orderedlist.3 of 11