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<script language="javascript">
function f1(input){
var oEvent=window.event?window.event:arguments[0];
if(!input.value){
alert("ÇëÊäÈë³É¼¨!");return;
}
var rank=document.getElementById("rank");

if(input.value>=90){
rank.value="ÓÅÐã"
}else if(input.value>=80&&input.value<90){
rank.value="Á¼ºÃ"
}else if(input.value>=60&&input.value<80){
rank.value="Ò»°ã"
}else if(input.value<60){
rank.value="Ì«²î"
}
}
</script>
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<head>
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