PHP array into Javascript function???

I have created an array called $array_1 in PHP and I am trying to send it to a Javascript function. I can't seem to get the function to read the array. The code used to send the array and the function are below. Am I missing something?

function test_js(array_var)
{alert (array_var.length);
var index = 0;
}


<?php echo"<a href=\"#nothing\" onmousedown=\"test_js($array_1)\">click</a>"; ?>

Thanks,

Shawn

figured it out, needed to wrap the parameter with <? ?> and quotes of course.

thanks.