function validate_form(x){
	for (var i=0;i<x.length;i++){
		if(x[i].value==""){
			alert("Please complete all the fields");
			return false;
		}
	}
	
	if (validate_email(x.mail,"Not a valid e-mail address!")==false)
  	{
  		return false;
	}
	
	return true;
}

function validate_email(field,alerttxt)
{
	with (field)
	{
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");

		if (apos<1||dotpos-apos<2) 
  		{
			alert(alerttxt);return false;}
		else {
			return true;}
		}
}