range对象的surroundContents方法如何用

2012-09-10

range对象的surroundContents方法怎么用？JScript code!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Tran

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);]

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range对象的surroundContents方法如何用