Javascript获取选中的html和取消选择状态代码，兼容IE、Chrome和FF

getSelect_clearSelect.js

function getSelectionHtml() {
    var html = "";
    if (typeof window.getSelection != "undefined") {
        var sel = window.getSelection();
        if (sel.rangeCount) {
            var container = document.createElement("div");
            for (var i = 0, len = sel.rangeCount; i < len; ++i) {
                container.appendChild(sel.getRangeAt(i).cloneContents());
            }
            html = container.innerHTML;
        }
    } else if (typeof document.selection != "undefined") {
        if (document.selection.type == "Text") {
            html = document.selection.createRange().htmlText;
        }
    }
    return html;
}

function clearSelection(){
    if (typeof window.getSelection != "undefined") {
        window.getSelection().removeAllRanges();
    } else if (typeof document.selection != "undefined") {
        document.selection.empty();
    }
}