getHTMLImageMap(url[, queryFormat[, extraAttr[, offsetX, offsetY ]]])

Generate the HTML image map for all data points on the layer.

Please refer to BaseChart.getHTMLImageMap for the detail description of this method.

This method should be called only after creating the chart image (eg. using BaseChart.makeChart, BaseChart.makeChart2 or BaseChart.makeSession). The image map cannot be determined without creating the chart image first.

Argument	Default	Description
url	(Mandatory)	The URL to be used in the "href" attribute of the image map. Parameter substitution and formatting is supported. If no href attribute is needed (e.g. the image map is for onmouseover events only), use an empty string as the URL.
queryFormat	""	A text string representing the template of the query parameters to be appended to the URL. Parameter substitution and formatting is supported. An empty string means the default query parameters will be used (see table above). To disable query parameters, use a space chartacter as the queryFormat.
extraAttr	""	A text string to specify additional attributes to add to the <area> tag. Parameter substitution and formatting is supported.
offsetX	0	An offset to be added to all x coordinates in the image map. This is useful if the current image will be shifted and inserted into another image. In this case, the image map will need to be shifted by the same offset.
offsetY	0	An offset to be added to all y coordinates in the image map. See offsetX above for description.

A text string containing the image map generated.