function trim(s) {
  return s.replace(/^\s+|\s+$/, '');
}


function validateMail() {	
	if (document.getElementById("name").value == 0) {
		alert('Please tell us your name');
		document.getElementById("name").focus();
		return false;
	}		
	if (document.getElementById("email").value.length < 1 ) {
		alert('Please tell us your email');
		document.getElementById("email").focus();
		return false;
	}	
	if (echeck(document.getElementById("email").value) == false){
		document.getElementById("email").focus();
		return false;
	}
	return true;
}// end function



function echeck(str) {
	var at="@";
	var dot=".";
	var lat=str.indexOf(at);
	var lstr=str.length;
	var ldot=str.indexOf(dot);
	if (str.indexOf(at)==-1){
	   alert('Please enter a valid email address');
	   return false;
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert('Please enter a valid email address');
	   return false;
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
	    alert('Please enter a valid email address');
	    return false;
	}

	 if (str.indexOf(at,(lat+1))!=-1){
	    alert('Please enter a valid email address');
	    return false;
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
	    alert('Please enter a valid email address');
	    return false;
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
	    alert('Please enter a valid email address');
	    return false;
	 }
	
	 if (str.indexOf(" ")!=-1){
	    alert('Please enter a valid email address');
	    return false;
	 }
	 return true;					
}