This sample is to display the X-axis label vertically.
Sets the value of the labelJsFunction property to the name of the JavaScript function.

●Layout
<horizontalAxis>
	<CategoryAxis id="hAxis" categoryField="Han" 
	displayName="Date" labelJsFunction="labelFunc"/>
</horizontalAxis>

●Script
Parameters
id: the ID of the axis
value: the axis label of the item
function labelFunc(id, value)
{
	var str = value;
	var len = str.length;
	var filterStr="";

	for( var i=0; i < len ; i++)
	{
		filterStr += str.substring(i,i+1)+"\n";
	}
	return filterStr;
}