Javascript 获取页面上选中的文字

 
<script type="text/javascript"> 
 
// 说明：获取页面上选中的文字 
// 整理：http://www.CodeBit.cn 
 
function getSelectedText() { 
    if (window.getSelection) { 
        // This technique is the most likely to be standardized. 
        // getSelection() returns a Selection object, which we do not document. 
        return window.getSelection().toString(); 
    } 
    else if (document.getSelection) { 
        // This is an older, simpler technique that returns a string 
        return document.getSelection(); 
    } 
    else if (document.selection) { 
        // This is the IE-specific technique. 
        // We do not document the IE selection property or TextRange objects. 
        return document.selection.createRange().text; 
    } 
} 
 
</script> 
 

 
<script type="text/javascript"> 
 
// 说明：FireFox 下获取 input 或者 textarea 中选中的文字 
// 整理：http://www.codebit.cn 
 
function getTextFieldSelection(e) { 
    if (e.selectionStart != undefined && e.selectionEnd != undefined) { 
        var start = e.selectionStart; 
        var end = e.selectionEnd; 
        return e.value.substring(start, end); 
    } 
    else return "";  // Not supported on this browser 
} 
 
</script>