function changecolor (id,on){
	 if (on) {
 	 	document.getElementById (id).style.color = '#FF0000';
 	 } else {
  	   	document.getElementById (id).style.color = '#003399'; 
	 }
}

function validate(){
var name  = document.form.name;
var email = document.form.email;
var phone = document.form.phone;
var msg   = "";
	if(name.value == ""){ 
  		msg+="Name is required." + "\n";
  		changecolor('name',true);
	 }
 		else{changecolor('name',false);}
		
    if(email.value == "")
	{
		msg+="Email is required." + "\n";
		changecolor('email',true);
	}
		else{changecolor('email',false);}
	
	if(phone.value == "")
	{
		msg+="Phone is required." + "\n";
		changecolor('phone',true);
	}
		else{changecolor('phone',false);}
	
	 if(msg != "") {
  		alert(msg);
		return false;
 	 }
 
 return true;
}