function chkContact(frm){
	var x = document.getElementById("Image_Value").value;
	var y = document.getElementById("Image_Answer").value;
	var x = x.toLowerCase();
	var y = y.toLowerCase();

	if ((frm.ContactName.value.length == 0)||(frm.Location.value.length == 0)||(frm.Email.value.length == 0)||(frm.PhoneNo.value.length == 0)||(frm.Image_Answer.value.length == 0)||(frm.LearnFrom.value.length == 0)){
		alert("\u8BF7\u5728\u63D0\u4EA4\u8868\u683C\u524D\uFF0C\u5FC5\u987B\u586B\u4E0A\u59D3\u540D\u3001\u56FD\u5BB6\u3001\u7535\u90AE\u3001\u7535\u8BDD\u53CA\u8BA4\u8BC1\u5BC6\u7801\u3002");
		return false;
	}

	if (frm.Email.value.indexOf("@") == -1){
		alert("\u8bf7\u63d0\u4f9b\u6709\u6548\u7535\u90ae\u3002");
		frm.Email.focus();
		return false;
	}

	if (x != y){
		alert("\u8BA4\u8BC1\u53F7\u7801\u4E0D\u6B63\u786E\uFF0C\u8BF7\u91CD\u65B0\u8F93\u5165\u3002");
		frm.Image_Answer.focus();
		return false;
	}
}

function chkSubscribe(frm){
	if ((frm.Firstname.value.length == 0)||(frm.Lastname.value.length == 0)||(frm.Email.value.length == 0)||(frm.eadd2.value.length == 0)){
		alert("\u8bf7\u5728\u63d0\u4ea4\u8868\u683c\u524d\uff0c\u586b\u4e0a\u59d3\u6c0f\uff0c\u540d\u79f0\u53ca\u7535\u90ae\u3002");
		return false;
	}

	if (frm.Email.value.indexOf("@") == -1){
		alert("\u8bf7\u63d0\u4f9b\u6709\u6548\u7535\u90ae\u3002");
		frm.Email.focus();
		return false;
	}
	
	if (document.getElementById("Email").value != document.getElementById("eadd2").value){
		alert("\u7535\u90ae\u5730\u5740\u4e0d\u7b26\uff0c\u8bf7\u91cd\u65b0\u8f93\u5165\u3002");
		frm.Email.focus();
		return false;
	}
}

function chkMailFriend(frm){
	if (frm.tomail.value.length == 0){
		alert("\u8bf7\u5728\u63d0\u4ea4\u8868\u683c\u524d\uff0c\u586b\u4e0a\u6536\u4ef6\u8005\u7684\u7535\u90ae\u3002");
		return false;
	}
	else {
		if (frm.tomail.value.indexOf("@") == -1){
			alert("\u8bf7\u63d0\u4f9b\u6709\u6548\u7535\u90ae\u3002");
			frm.tomail.focus();
			return false;
		}
	}
}

function showTextBox(Option) {
	if ((Option.value == "Attended event/exhibition")||(Option.value == "Saw advertisement in print media")||(Option.value == "Saw online advertisement")||(Option.value == "Read an article about Crown")||(Option.value == "Read a Crown publication")||(Option.value == "Yellow pages/business directory in print media")||(Option.value == "Yellow pages/business directory online")||(Option.value == "Other")){
		document.getElementById("Other").style.display = "block";
	}
	else {
		document.getElementById("Other").style.display = "none";
	}
}