rem: return x - y; 
add: return x - y; 
context: function comparefn1( x, y ) {    return x - y;}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/f5797aeb2410e2259028142b87595fe71f03e531/15.4.4.5-3.js/clean/js/tests/ecma/Array/15.4.4.5-3.js