range对象的surroundContents方法怎么用？
- JScript code
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script type="text/javascript"> //<![CDATA[ window.onload = function() { /* * startContainer * startOffset * endContainer * endOffset * commonAncestorContainer * * selectNode(selNode); * selectNodeContents(selNode); * setStartBefore(refNode); * setStartAfter(refNode); * setEndBefore(refNode); * setEndAfter(refNode); * * setStart(node, offset); * setEnd(node, offset); * * deleteContents(); * extractContents(); * * insertNode(cteNode); * surroundContents(cteNode); */ var p1 = document.getElementById("p1"); var helloNode = p1.firstChild.firstChild; var worldNode = p1.lastChild; var range = document.createRange(); range.setStart(helloNode, 2); range.setEnd(worldNode, 3); var span = document.createElement("span"); span.style.color = "yellow"; alert(1); range.surroundContents(f); //这里出错; alert(2); }; //]]></script></head><body><p id="p1"><b>Hello</b> world!</p></body></html>上边是我的代码，按照书上的例子在ff中测试的，不知道什么导致的错误。请高手指点！
[解决办法]
好像是说边界不符合要求, 不能夸标签的吧
The boundary-points of a range does not meet specific requirements.
[code=JScript]
[/codevar p1 = document.getElementById("p1");
var helloNode = p1.firstChild.firstChild;
var worldNode = p1.lastChild;
var range = document.createRange();
range.setStart(helloNode, 0);
range.setEnd(helloNode, 5);
var span = document.createElement("span");
span.style.color = "yellow";
alert(1);
range.surroundContents(span); //这里出错;
alert(2);]