php中,用echo调用JS函数,有什么有关问题

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Release: 2016-06-13 11:26:30
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php中,用echo调用JS函数,有什么问题?
     echo "<script>show_div();</script>";
?>

js函数:
function show_div(){
    document.getElementById("show").style.display="block";
}

//div 是隐藏的,想通过php调用JS的函数把div显示出来

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