function checkname(){
	var objName = document.getElementById("uname");
	var objDiv = document.getElementById("ucname");
	if(objName.value == ""){
		objDiv.innerHTML = "<img src='images/th.jpg' width='13' height='13' border='0'/>  请输入姓名！";
		return true;
	} else {
		objDiv.innerHTML = "";
		return false;
	}
}
function checksex(){

	var input = document.getElementsByName('usex');
	var objDiv = document.getElementById('ucsex');
	var flg = false;
	for (var i=0;i<input.length;i++) {
		if (input[i].checked == false){
			objDiv.innerHTML = "<img src='images/th.jpg' width='13' height='13' border='0'/>  请选择性别！";
			flg = true;
		} else {
			input[i].checked=true;
			objDiv.innerHTML = "";
			flg = false;
			break;
		}
	}
	return flg;
}
function checkemail(){
	var objName = document.getElementById("uemail");
	var objDiv = document.getElementById("ucemail");
	var mail = objName.value;
	if(mail == ""){
		objDiv.innerHTML = "<img src='images/th.jpg' width='13' height='13' border='0'/>  请输入邮箱！";
		return true;
	} else if(mail != ""){
		if (mail.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1){
			objDiv.innerHTML = "";
			return false;
		} else {
			objDiv.innerHTML = "<img src='images/th.jpg' width='13' height='13' border='0'/>  请输入合法邮箱地址！";
			return true;
		}
	} else {
		objDiv.innerHTML = "";
		return false;
	}
}
function checktitle(){
	var objName = document.getElementById("utitle");
	var objDiv = document.getElementById("uctitle");
	if(objName.value == ""){
		objDiv.innerHTML = "<img src='images/th.jpg' width='13' height='13' border='0'/>  请输入留言标题！";
		return true;
	} else {
		objDiv.innerHTML = "";
		return false;
	}
}
function formcommit(){
	var objForm = document.getElementById("formid");

	if(checkname()){
		return;
	}
	if(checkemail()){
		return;
	}
	if(checktitle()){
		return;
	}
	if(checksex()){
		return;
	}
	objForm.submit();
}