function checkForm() {
	var obj = document.form1;
	if("" == obj.lxr.value){
		alert("请填写姓名");
		obj.lxr.focus();
		return false;
	}
	if("" == obj.lxyx.value){
		alert("请填写电子邮箱");
		obj.lxyx.focus();
		return false;
	}
	var CheckMail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/;
	var email = obj.lxyx.value;
	if(!CheckMail.test(email)) {
		alert("电子邮箱地址格式不正确");
		obj.lxyx.focus();
		return false;
	}
	if("" == obj.lynr.value){
		alert("请填写留言内容");
		obj.lynr.focus();
		return false;
	}
}