Capture Table

capture-table.js

/**
 * Loop through a table and pull out certain cells of data.
 * 
 * This loops through a the rows of a table and grabs the requested cell(s) from each row.
 * Cell data is seperated with tabs when multiple cells of data are requested OR with the
 * combine flag set to true the data will be combined into a single string per row.
 *
 * Version: Alpha
 *
 * @param {int} id The value of the tables HTML id attribute.
 * @param {array} cells An array of cell numbers you would like; counting starts at 0!
 * @param {bool} combine Set to true to combine multiple cells of data into a single string; default false.
 */
function captureTable( id, cells, combine ) {
	var tbl = document.getElementById( id );
	var tr  = tbl.querySelectorAll('tr');
	var td;
	var rowCount = tr.length;
	var cellCount  = 0;
	var cell;
	var output = '';
	for ( var row = 0; row < rowCount; row++ ) {
		td = tr[ row ].querySelectorAll('td');
		cellCount = td.length;
		for ( cell = 0; cell < cellCount; cell++ ){
			if ( combine ) {
				if ( cells.indexOf( cell ) > -1 ) {
					output += td[ cell ].innerText.trim();
				}
			} else {
				if ( cells.indexOf( cell ) > -1 ) {
					output += td[ cell ].innerText.trim() + '\t';
				}
			}
		}
		output += '\n';
	}
	console.log( output );
	return output;
}

worked as advertised, applied an id test to the table in question and did

captureTable("test", [2])

and got the column I wanted