Adding elements to an array

Hello, I have a requirement to add elements to an associate array dynamically based on some conditions. I initialize the array with the 1st associate array element $MyArray = array('DATETIME' => $DateTime); How do I add more elements to this associate array. I am using PHP 3 and array_merge and other functions for arrays are not supported in PHP3. I am trying the following: $MyArray[] = array("BUYVAL" => "1.23"); but if I try and get the value of $MyArray[BUYVAL], I get nothing. I am sure this must be simple, but I do not seem to be getting it right!! Regards, Sharat Hegde Phone: 6560360 Ext 4680