osCommerce / oscommerce2

	function DrawYAxis() {

		//Draw Line at left side or at this->y_axis_position

		if ($this->y_axis_position != "") {

			$yaxis_x = $this->xtr($this->y_axis_position);

		} else {

			$yaxis_x = $this->plot_area[0];

		}

		ImageLine($this->img, $yaxis_x, $this->plot_area[1],

			$yaxis_x, $this->plot_area[3], $this->ndx_grid_color);

		//Its faster to draw both left and right ticks at same time

		//  than first left and then right.

		if ($this->y_axis_position != "") {

			//Ticks and lables are drawn on the left border of yaxis

			$yaxis_x = $this->xtr($this->y_axis_position);

		} else {

			//Ticks and lables are drawn on the left border of PlotArea.

			$yaxis_x = $this->plot_area[0];

		}

		$y_pixels = $this->ytr($which_ypos);