function validate(){
	
	var email=document.getElementById("email").value;
	var address=document.getElementById("address").value;
	var flname=document.getElementById("sender_name").value;
	var tel=document.getElementById("telephon").value;
	submitOK="true";
	
	emailRegExp = /^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.([a-z]){2,4})$/  
	
	if(!/\S/.test(flname)){
		alert("Name is empty"); 
		return false;
	}
	
	if(!emailRegExp.test(email)){
		alert("e-mail is empty"); 	
		return false;	
	}
	
	return true;
	
}