function chkValidity()
{
	var test_name= document.getElementById("test_name");
	var test_phone = document.getElementById("test_phone");
	var test_email= document.getElementById("test_email");
	var frmMain="frmMain";
	var total_question=7;
	
	if(isEmpty(test_name.value)){
        alert('Please provide your name');
		test_name.focus();
        return false;
    }

	if(isEmpty(test_phone.value)){
        alert('Please provide your phone number');
		test_phone.focus();
        return false;
    }
	
	if(!emailCheck(test_email)){
		alert('Please provide valid e-mail address');
		test_email.focus();
		return false;
    }
	

	return true;
}


function emailCheck(obj)
{
	var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
	var returnval=emailfilter.test(obj.value);
	return returnval;
}

function isEmpty( str ){
    var strRE = /^[\s ]*$/gi;
    return strRE.test( str );
}