function emailValidation(lang)
{
	var name_user  = document.getElementById("name_user1");
	var email_user  	  = document.getElementById("email_user1");
	var subject	  = document.getElementById("subject");
	var msg		  = document.getElementById("msg");
	var captcha  	= document.getElementById("captcha");
	
	if(lang == "en"){
		var ERR1	= "Please enter your name.";
		var ERR2	= "Please enter valid Email.";
		var ERR3	= "Please enter your Message subject.";
		var ERR4	= "Please enter your Message.";
		var ERR5    = "Please enter the security code";
	}
	else{
		var ERR1	= "الرجاء ادخال الاسم";
		var ERR2	= "الرجاء ادخال البريد الالكتروني";
		var ERR3	= "الرجاء ادخال الموضوع";
		var ERR4	= "الرجاء ادخال الرسالة";
		var ERR5    = "الرجاء ادخال الرمز الأمني";
	}
	
	if(name_user.value == ""){	
		document.getElementById("nameDER").innerHTML = ERR1;	
		name_user.focus();
		return false;
		
	}
	else{
		document.getElementById("nameDER").innerHTML = "";
	}

	if(email_user.value == "" || !isValidEmail(email_user.value)){	
		document.getElementById("emailDER").innerHTML = ERR2;	
		email_user.focus();
		return false;
		
	}
	else{
		document.getElementById("emailDER").innerHTML = "";
	}

	if(subject.value == ""){	
		document.getElementById("subjectDER").innerHTML = ERR3;	
		subject.focus();
		return false;
	}
	else{
		document.getElementById("subjectDER").innerHTML = "";
	}

	if(msg.value == ""){	
		document.getElementById("msgDER").innerHTML = ERR4;	
		msg.focus();
		return false;
		
	}
	else{
		document.getElementById("msgDER").innerHTML = "";
	}
	
	if(captcha.value == ""){	
		document.getElementById("captchaDER").innerHTML = ERR5;	
		captcha.focus();
		return false;
		
	}
	else{
		document.getElementById("captchaDER").innerHTML = ERR5;
	}
	
return true;
}