// JavaScript Document
function validatemail(){
	if(document.getElementById('mail_subject').value == ""){
		alert('กรุณาระบุ หัวข้อเรื่อง');
		document.getElementById('mail_subject').focus();
		return false;
	}
	if(document.getElementById('mail_to').value == ""){
		alert('กรุณาระบุ อีเมลล์ผู้รับ');
		document.getElementById('mail_to').focus();
		return false;
	}
	if(document.getElementById('mail_from').value == ""){
		alert('กรุณาระบุ อีเมลล์ผู้ส่ง');
		document.getElementById('mail_from').focus();
		return false;
	}
	return true;
}
function replaceAll(OldString,FindString,ReplaceString) {  
	var SearchIndex = 0;  
	var NewString = "";   
	while (OldString.indexOf(FindString,SearchIndex) != -1) {  
		NewString += OldString.substring(SearchIndex,OldString.indexOf(FindString,SearchIndex));  
		NewString += ReplaceString;  
		SearchIndex = (OldString.indexOf(FindString,SearchIndex) + FindString.length);   
	}  
	NewString += OldString.substring(SearchIndex,OldString.length);  
	return NewString;  
}