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<input type="button" id="btnTest" value="xxx" onclick="testOnclick();" />
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<script type="text/javascript">
function testOnclick() {
alert("ÇëÊäÈ룺ÊéÃû.......");//µ¯³ö¶Ô»°¿ò
document.getElementById(textTest).value = "" //Çå¿Õ
}
</script>
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