分享一段选中文字分享到微博的代码[转]

代码：

<STYLE>  
.img_sina_share {  
DISPLAY: none; CURSOR: pointer; POSITION: absolute  
}  
.img_qq_share {  
DISPLAY: none; CURSOR: pointer; POSITION: absolute  
}  
</STYLE>  
<IMG   
class=img_sina_share id=imgSinaShare title=将选中内容分享到新浪微博   
src="http://simg.sinajs.cn/blog7style/images/common/share.gif">  
<IMG   
class=img_qq_share id=imgQqShare title=将选中内容分享到腾讯微博   
src="http://open.t.qq.com/images/resource/weiboicon32.png" weight="26" height="26">  
<SCRIPT>  
var eleImgShare = document.getElementById("imgSinaShare"); //新浪微博图标  
var eleImgShare2 = document.getElementById("imgQqShare"); //腾讯微博图标  
  
var $miniBlogShare = function(eleShare,eleShare2,eleContainer) { //实现方法  
var eleTitle = document.getElementsByTagName("title")[0];  
eleContainer = eleContainer || document;  
var funGetSelectTxt = function() { //获取选中文字  
var txt = "";  
if(document.selection) {  
txt = document.selection.createRange().text; // IE  
} else {  
txt = document.getSelection();  
}  
return txt.toString();  
};  
eleContainer.onmouseup = function(e) { //限定容器若有文字被选中  
e = e || window.event;  
var txt = funGetSelectTxt(), sh = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0;  
var left = (e.clientX - 40 < 0) ? e.clientX + 20 : e.clientX - 40, top = (e.clientY - 40 < 0) ? e.clientY + sh + 20 : e.clientY + sh - 40;  
if (txt) {  
eleShare.style.display = "inline";  
eleShare.style.left = left + "px";  
eleShare.style.top = top + "px";  
eleShare2.style.display = "inline";  
eleShare2.style.left = left + 30 + "px";  
eleShare2.style.top = top + "px";  
} else {  
eleShare.style.display = "none";  
eleShare2.style.display = "none";  
}  
};  
eleShare.onclick = function() { //点击新浪微博图标  
var txt = funGetSelectTxt(), title = (eleTitle && eleTitle.innerHTML)? eleTitle.innerHTML : "未命名页面";  
if (txt) {  
window.open('http://v.t.sina.com.cn/share/share.php?title=' + txt + '→来自页面"' + title + '"的文字片段&url=' + window.location.href);   
}  
};  
eleShare2.onclick = function() { //点击腾讯微博图标  
var txt = funGetSelectTxt(), title = (eleTitle && eleTitle.innerHTML)? eleTitle.innerHTML : "未命名页面";  
if (txt) {  
window.open( 'http://v.t.qq.com/share/share.php?title=' + encodeURIComponent(txt + '→来自页面"' + title + '"的文字片段&url=' + window.location.href));   
}  
};  
}(eleImgShare,eleImgShare2);  
</SCRIPT>

效果可以参考本微薄

来自：http://www.discuz.net/thread-2077854-1-1.html
部分修改。