function _startsWithIgnoreCase(sTextToTest, sSearchTerm) {
		if (!sTextToTest || !sSearchTerm) {
			return false;
		}

		return sTextToTest.toLowerCase().indexOf(sSearchTerm.toLowerCase()) === 0;
	}
Checks if a text starts with a search term. Case insensitive.

@param sTextToTest {string}
@param sSearchTerm {string}
@returns {boolean}
@private