javascript - window.onbeforeunload not working in chrome -

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possible duplicate:
window.onbeforeunload not working in chrome

window.onbeforeunload=function(); not working in chrome.. works ie , mozila not works chrome.. there way use window.onbeforeunload=function(); in chrome......... in advance.......

i have tested following in chrome , works...

    window.onbeforeunload = function () {         alert("hello");     };

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