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copied!<p>The first means I've come up with is:</p> <pre><code>function change(fld, id) { var opt = fld.selectedIndex; if (fld[opt].value != ' ') { var sel = document.getElementById(id); for (var i = sel.options.length - 1; i > -1; i--) { if (fld[opt].value == sel[i].value) sel[i].selected = true; } } } $('select').change( // moving away from intrusive in-line JavaScript function() { var changeTarget; // used to determine which select to change if (this.id == 'make') { changeTarget = 'model'; } else { changeTarget = 'make'; } change(this,changeTarget); }); $('#add').click( function() { $('#table tbody tr:last').clone(true).appendTo($('#table')).find('input,select').each( function() { var attr = this.id.replace(/\d/, ''); // gets the text of the id attribute var length = $('#table tbody tr').length; // finds what number the new attributes should be if ($(this).is('input')){ // select elements don't need their name to be changed $(this).attr({ 'id': attr + length, 'name': attr + length }); } else if ($(this).is('select')){ $(this).attr('id',attr + length); } }); }); </code></pre> <p><a href="http://jsfiddle.net/davidThomas/ef3eg/3/" rel="nofollow">JS Fiddle demo</a>.</p> <hr /> <p><strong>Edited</strong> to remove the hard-coded 'make'/'model' choice in the <code>select</code> <code>change()</code> event-handler to the following:</p> <pre><code>$('select').change( function() { var changeTarget = $(this) .closest('tr') .find($('select')) .not($(this)) .attr('id'); change(this,changeTarget); }); </code></pre> <p><a href="http://jsfiddle.net/davidThomas/ef3eg/4/" rel="nofollow">JS Fiddle demo</a>.</p>

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