Uncaught TypeError: $(…).live is not a function

Uncaught TypeError: $(…).live is not a function

$('.tz-qty-cont').live('click', function(){

			var qty_input = $(this).parent().find('input[name="quantity"]');
			if ( $(qty_input).prop('disabled') ) return;
			var qty_step = parseFloat($(qty_input).attr('step'));
			var qty_min = parseFloat($(qty_input).attr('min'));
			var qty_max = parseFloat($(qty_input).attr('max'));

			if ( $(this).hasClass('minus') ){
				var vl = parseFloat($(qty_input).val());
				vl = ( (vl - qty_step) < qty_min ) ? qty_min : (vl - qty_step);
				$(qty_input).val(vl);
			} else if ( $(this).hasClass('plus') ) {
				var vl = parseFloat($(qty_input).val());
				vl = ( (vl + qty_step) > qty_max ) ? qty_max : (vl + qty_step);
				$(qty_input).val(vl);
			}
			$(qty_input).trigger('change');

		});