Check variable's primitive datatype

dataTypeCheck.js

// just typepof myVar == 'string' fails when my var is declared => var myVar = new String("value");
if (typeof myVar == 'string' || myVar instanceof String){
	// it's a string
}
// just typepof myVar == 'string' fails when my var is declared => var myVar = new String("value");
if (typeof myVar == 'number' || myVar instanceof Number){
	// it's a string
}