function formcheck(myform)
{
	document.getElementById('errName').innerHTML = "";
	document.getElementById('errEmail').innerHTML = "";
	document.getElementById('errBlock').innerHTML = "";
	document.getElementById('errfeedback').innerHTML = "";
	
	if(myform.name.value == "")
	{
		document.getElementById('errName').innerHTML = "Name is required";
		myform.name.focus();
		return (false);
	}
	if(myform.email.value =="")
	{
		document.getElementById('errEmail').innerHTML = "Email is required";
		myform.email.focus();
		return (false);
	}
	if(myform.email.value != '')
	{
	  	var email  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if(!email.test(myform.email.value))
		{
			document.getElementById('errEmail').innerHTML = "Enter a valid email address";
			myform.email.focus();
			return (false);
		}
	}
	if(myform.block.selectedIndex == 0)
	{
		document.getElementById('errBlock').innerHTML = "Please select block";
		myform.block.focus();
		return (false);
	}
	if(myform.feedback.value =="")
	{
		document.getElementById('errfeedback').innerHTML = "Feedback is required";
		myform.feedback.focus();
		return (false);
	}
	return true;
}