function checkEmail(ob){
	ob.value=ob.value.replace(" ","");
	ob.value=ob.value.replace(" ","");
	ob.value=ob.value.replace(" ","");
	ob.value=ob.value.replace(" ","");
	ob.value=ob.value.replace(" ","");
	ob.value=ob.value.replace("~","");	
	ob.value=ob.value.replace("!","");	
	ob.value=ob.value.replace("#","");		
	ob.value=ob.value.replace("$","");
	ob.value=ob.value.replace("%","");
	ob.value=ob.value.replace("^","");
	ob.value=ob.value.replace("&","");
	ob.value=ob.value.replace("*","");
	ob.value=ob.value.replace("(","");
	ob.value=ob.value.replace(")","");
	return true;
}


function vldemail(ob) {
	if (ob.value.indexOf("@")==-1) {
		ErrMsg = ErrMsg+"您的email格式有誤!\n";
		ob.select();
		return false;		
	} else if (ob.value.indexOf(".")==-1) {
		ErrMsg = ErrMsg+"您的email格式有誤!\n";
		ob.select();
		return false;
	}
	return true; 
}



function checksearch() {
	ErrMsg = "";
	if(document.contentsearch.searchword.value=="")	{
		ErrMsg = ErrMsg+"請輸入 搜尋內容!\n";
	}
	if(ErrMsg!="")	{
		alert(ErrMsg);
		return false;
	}
	else {
		return true;
	}
}



function checkform1() {

	if (document.form1.st1.value=="訂閱") {
	if (document.form1.email.value.indexOf("yahoo")==-1 && document.form1.email.value.indexOf("hotmail")==-1) { } else {
	alert("yahoo或hotmail郵件帳號常有可能被誤認為垃圾信件而無法收到古華電子報，\n建議您使用其他email帳號更佳!");
	}
	}

	ErrMsg = "";
	if(document.form1.email.value=="" || document.form1.email.value=="請輸入E-mail")	{
		ErrMsg = ErrMsg+"請輸入 E-mail!\n";
	} else {
		vldemail(document.form1.email);
		checkEmail(document.form1.email);
	}
	if(ErrMsg!="")	{
		alert(ErrMsg);
		return false;
	}
	else {
		return true;
	}
}



function checkform2() {

	if (document.form2.st3.value=="確定寄出") {
	if (document.form2.email2.value.indexOf("yahoo")==-1 && document.form2.email2.value.indexOf("hotmail")==-1) { } else {
	alert("yahoo或hotmail郵件帳號常有可能被誤認為垃圾信件而無法收到古華電子報，\n建議您使用其他email帳號更佳!");
	}
	}

	ErrMsg = "";
	if(document.form2.email2.value=="" || document.form2.email2.value=="請輸入E-mail")	{
		ErrMsg = ErrMsg+"請輸入 E-mail!\n";
	} else {
		vldemail(document.form2.email2);
		checkEmail(document.form2.email2);
	}
	if(ErrMsg!="")	{
		alert(ErrMsg);
		return false;
	}
	else {
		return true;
	}
}