js正则表达式提取汉字

//格式化单元格文本内容
function formatContent(cellvalue, options, rowObject) {
	//alert(cellvalue);
	if(cellvalue != null && cellvalue != ""){
	    //去掉<p><br/></p>
	    //return cellvalue.replace(/<p>/ig,"").replace(/</p>/ig,"").replace(/<br/>/ig,"");
	    //只提取汉字
	    var reg = /[u4e00-u9fa5]/g; 
	    //console.log(cellvalue.match(reg));
	    var result = cellvalue.match(reg); 
	    return result.join("");
	}
	else
		return "";
}