Returns a string where all alphabetic characters have been converted to uppercase.
"String Literal".toUpperCase( )
The toUpperCase method has no effect on non-alphabetic characters.
The following example demonstrates the effects of the toUpperCase method:
var strVariable = "This is a STRING.";
strVariable = strVariable.toUpperCase( );
The value of strVariable after the last statement is:
Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards. See Version Information.