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 傳回所選擇的文字 
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document.getelection 可傳回所選擇的文字
程式碼如下:
		<script>
			function Event1(){
				alert(document.getSelection());
			}
		</script>
    
    
        abcdefghijklmnopqrstuvwxyz123456789...abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
        <input type="button" value="Press to start" onclick="Event1()">