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<script type="text/javascript">
        function ic() {
            alert(document.getElementById("Num1").value * document.getElementById("Num2").value);
        }
    </script>

<input type="text" id="Num1" />
    <input type="text" id="Num2" onblur="ic();" />


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function getNum() {
            var firstStr = document.getElementById("Num1").value;
            var SccondStr = document.getElementById("Num2").value;
            var Num;
            if (parseInt(firstStr) && parseInt(SccondStr)) {
                Num = firstStr * SccondStr;
                alert(Num);
            }
            else {
                alert("ÇëÊäÈëÊý×Ö£¡")
       


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