// JavaScript Document
String.prototype.Trim = function() { 
	return this.replace(/(^\s*)|(\s*$)/g, ""); 
} 

function checkMail(email) {
	var x = email;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x)) return true;
	else return false;
}

function getCheckedValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}

function checkContact(myForm) {
	uname = myForm.uname;
	email = myForm.email;
	phone = myForm.phone;
	content = myForm.content;
	
	var sendFlag = true;

	if (uname.value.Trim() == "" && sendFlag){
		alert("請輸入你的姓名");
		sendFlag = false;
		uname.focus();
	}
	
	if (email.value.Trim() == "" && sendFlag){
		alert("請輸入你的電郵地址");
		sendFlag = false;
		email.focus();
	} else if (!checkMail(email.value) && sendFlag) {
		alert("電郵地址不正確，請重新輸入。");
		sendFlag = false;
		email.focus();
	}
	
	if (phone.value.Trim() == "" && sendFlag){
		alert("請輸入你的電話");
		sendFlag = false;
		phone.focus();
	}	
	
	if (content.value.Trim() == "" && sendFlag){
		alert("請輸入你的留言內容");
		sendFlag = false;
		content.focus();
	}	
					
	if (sendFlag) {
		myForm.method = "POST";
		myForm.submit();
	}
}