function is_number(str)
{
	exp=/[^0-9()-]/g;
	if(str.search(exp) != -1)
	{
		return false;
	}
	return true;
}
function is_email(str)
{ if((str.indexOf("@")==-1)||(str.indexOf(".")==-1))
{
	
	return false;
	}
	return true;
}

function CheckInput(){

	if(document.getElementById("name").value == ""){
		alert("please write your name");
		document.getElementById("name").focus();
		return false;
	}

	if( document.getElementById("email").value =="") {
        alert("please write your E-mail !")
		document.getElementById("email").focus();
        return false;
    }

	if(!is_email(document.getElementById("email").value))
	{ 	alert("Your EMail address is wrong");
		document.getElementById("email").focus();
		return false;
	}
   if(document.getElementById("country").value==""){
		alert("please write your country!");
		document.getElementById("country").focus();
		return false;
	}
	
	if(document.getElementById("content").value==""){
		alert("you not write message");
		document.getElementById("content").focus();
		return false;
	}
	

	/*if(form.title.value==''){
		alert("please write your country");
		form.title.focus();
		return false;
	}
	if(form.title.value.length>50){
		alert("content can not 50");
		form.title.focus();
		return false;
	}*/
	
    
	
	return true;
}