function checkdata(num){
	if(document.form1.email_txt.value ==""){
		alert("請輸入您的email");	
		document.form1.email_txt.focus();
	}else if(!CheckEmail(document.form1.email_txt.value)){
		document.form1.email_txt.focus();
		alert("請輸入正確的Email");		
	}else{
	if(num==2){
		document.form1.email_act.value = num;
		document.form1.submit()
		}else if(num==1){
			openCenteredWindow('newslatter.php?email='+document.form1.email_txt.value,350,300,'win')		
		}
		document.form1.email_txt.value ="";
	}
	//
}