function formValidation(){
	var username 						= document.getElementById('user_name');
	var email 							= document.getElementById('email');
	var comments 						= document.getElementById('comments');
	if(isAlphabet(username, "Please enter only letters for your name")){
			if(emailValidator(email, "Please enter valid email address")){
							
								return true;
				}
			}	
	return false;
}

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

function removeText(id,value,text){
		if(value == text){
			$("#"+id).val('');
		}	
	}
	function checkText(id,value,text){
		if(value == ''){
			$("#"+id).val(text);
		}
	}