<script type="text/javascript">

function getFieldSelection(select_field)

    word='';

    if (document.selection) {

        var sel = document.selection.createRange();

        if (sel.text.length > 0) {

            word = sel.text;

        }

    }

    else if (select_field.selectionStart || select_field.selectionStart == '0') {

        var startP = select_field.selectionStart;

        var endP = select_field.selectionEnd;

        if (startP != endP) {

            word = select_field.value.substring(startP, endP);

        }

    }

    return word;

</script>

<textarea id="a" rows="3" cols="20">选择我,然后点击下面的按钮</textarea><br />

<button onclick="alert(getFieldSelection(document.getElementById('a')))">button_click</button>

<br />

<strong>

 

 

//javascript/9008