将文本转换为dom节点

jQuery(document).ready(function(){
    var reg = /(http:\/\/(item|detail)\.(taobao|tmall)\.com\/item\.htm\?(.+?&)*id=(\d+)(&.+?)*)(\s+|[\u4E00-\u9FA5])/i;
	var blockId = "xxx"; 

    var urlBase = "http://xxx.tianya.cn/"+blockId+ "/";
	function innerHighlight2(node) {
		var skip = 0, rs = null, pat = null, id = null;
		if (node.nodeType == 3) {
			rs = reg.exec(node.data + " ");
			pat = rs ? rs[1] : null;
			if (!pat) {
				return skip;
			}
            
			id = rs[5];
			var pos = node.data.indexOf(pat);
			if (pos >= 0) {
				var spannode = document.createElement('span');
				spannode.className = 'ad_taobao_key highlight';
                spannode.style.color = '#2965B1';
                spannode.style.cursor = 'pointer';
//				spannode.setAttribute("tid", id);
				var middlebit = node.splitText(pos);
                middlebit.splitText(pat.length);
                var textNode = document.createTextNode(urlBase + id);
				spannode.appendChild(textNode);
				middlebit.parentNode.replaceChild(spannode, middlebit);
				skip = 1;
			}
		} else if (node.nodeType == 1 && node.childNodes
				&& !/(script|style)/i.test(node.tagName)) {
			for (var i = 0; i < node.childNodes.length; ++i) {
				i += innerHighlight2(node.childNodes[i]);
			}
		}
		return skip;
	}
	
	jQuery('.bbs-content').each(function(){
	          innerHighlight2(this);
	});
/*	jQuery(document).click(function(event){
	     var t = jQuery(event.target);
	     if(t.is("span") && t.hasClass("ad_taobao_key") ){
	     }
	});
*/
});