please help me out here error in this javascript

hi admin or others i want to use this script to display trading comment with number of comment in post eg 54=x94veryhotx94 please check this script and correct error thanks

'<script> var count= x91<?php $comment_num ?>'; if (count>=10) { document.write (x93Trending!!x94);} else if (count>=6) { document.write(x93Super HOT!!x94); } else if (count>=5) { document.write(x93Extra HOT!!x94);} else if (count>=4) { document.write(x93HOT!!x94);} else if (count>=3) { document.write(x93New!x94); } else if (count>=2) { document.write(x93New!x94);} else if (count>=1) { document.write(x93New!x94);} else {document.write(x931.0x94);}</script>'

waiting for response thanks