select(document, tanchu);
/*=select[[
*
* 跨瀏覽器選中文字事件
* @param
* object o 響應選中事件的DOM對象，required
* function fn(sText,target,mouseP)選中文字非空時的回調函數，required
* |-@param
* |-sText 選中的文字內容
* |-target 觸發mouseup事件的元素
* |-mouseP 觸發mouseup事件時鼠標坐標
*/
function select(o, fn){
o.onmouseup = function(e){
var event = window.event || e;
var target = event.srcElement ? event.srcElement : event.target;
if (/input|textarea/i.test(target.tagName) && /firefox/i.test(navigator.userAgent)) {
//Firefox在文本框內選擇文字
var staIndex=target.selectionStart;
var endIndex=target.selectionEnd;
if(staIndex!=endIndex){
var sText=target.value.substring(staIndex,endIndex);
fn(sText,target);
}
}
else{
//獲取選中文字
var sText = document.selection == undefined ? document.getSelection().toString():document.selection.createRange().text;
if (sText != "") {
//將參數傳入回調函數fn
fn(sText, target);
}
}
}
}
/*]]select=*/
function tanchu(txt,tar){
alert("文字屬于"+tar.tagName+"元素，選中內容為："+txt);
}

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;
}
}