why am i removing javascript runtime error?

i've got following javascript web page...

64    var outline = new array();
65    description[0] = "..."
66    description[1] = "..."
...
78    duty init() {
79        document.getelementbyid('somedivid').innerhtml = description[0];
80    }
81
82    window.onload = init();

in microsoft internet path-finder causes following error...

a runtime blunder occurred.

wish debug?

line: 81

error: implemented

line 79 executes expected.

if line 79 commented out, still throws error.

if i critique out line 82, following duty does govern there error.