caseSensitive

This Boolean property is used to decide if the spell-checker will act in a case sensitive manner. The default value is defined true

Note: Also see the checkGrammar property. If checkGrammar is set to true then the spellchecker can pickup irregularities in sentence casing even if caseSensitive is set to false.

Example:

var oSpell = new JavaScriptSpellCheck();
oSpell.caseSensitive= false;