// JavaScript Document
function formValidator(){
	// Make quick references to our fields
	var name = document.getElementById('name');
	var subject = document.getElementById('subject');
	var comments = document.getElementById('comments');
	var email = document.getElementById('email');
    
	// Check each input in the order that it appears in the form!
	
	

	if(isAlphabet(name, 'Please Enter valid Name')){
		if(isAlphanumeric(subject, 'Plese Enter Valid Subject')){         	
					if(emailValidator(email, 'Enter valid Email Address')){
						if(isAlphanumeric(comments, 'Enter Your comments ')){
							return true;
														
						  }
					 } 
			  
		  }	   
	}	
					
	
	return false;
	
}


function isEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); // set the focus to this input
		return true;
	}
	return false;
}

function isNumeric(elem, helperMsg){
	var numericExpression = /^[0-9]+$/;
	if(elem.value.match(numericExpression)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function isAlphabet(elem, helperMsg){
	var alphaExp = /[a-zA-Z]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function isAlphanumeric(elem, helperMsg){
	var alphaExp = /[0-9a-zA-Z]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}



function madeSelection(elem, helperMsg){
	if(elem.value == 'Please Choose'){
		alert(helperMsg);
		elem.focus();
		return false;
	}else{
		return true;
	}
}


function emailValidator(elem, helperMsg){
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	if(elem.value.match(emailExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}