[JavaScript]获取网页中选中部分的源代码

转载自from: http://topic.csdn.net/u/20090109/21/70c206df-bfc9-4f11-b3d2-4b99b2471e2b.html

function Gethtmlcode() {
    var rng=null,html="";
    if (window.document.selection && window.document.selection.createRange){
            rng=window.document.selection.createRange();
            html=rng.htmlText;
    }else if (window.getSelection){
            rng=window.getSelection();
            if (rng.rangeCount > 0 && window.XMLSerializer){
                    rng=rng.getRangeAt(0);
                    html=new XMLSerializer().serializeToString(rng.cloneContents());
            }
    }