function search2() {
	if (document.search1.keyword.value == ""){
		alert ("请输入您要搜索的相关关键词！");	
		document.search1.keyword.focus();
		return false;
	}
		if (document.search1.keyword.value == "请输入关键字"){
		alert ("请输入您要搜索的相关关键词！");	
		document.search1.keyword.focus();
		return false;
	}
	
	return true;
}