Disapply Pattern
This sample is to show how to apply patterns for visually impaired users.
trackValues: Sets the ranges for applying patterns
trackColors: Sets the colors for each range
patternMode: Sets the value of the patternMode property to true 
patternJsFunction: Sets the value of the patternJsFunction property to the JS function name 


ā—¸Script
var chartVars = "KoolOnLoadCallFunction=chartReadyHandler";
If you want to apply patterns, please add the string, usePattern=true, to chartVars
chartVars += "&usePattern=true";