function checkvalid()
{
		return validate();
}

function validate()
{
	var name = document.frmcontact.txtname.value;
	if(name.length < 5)
	{
		alert("Please enter your Name");
		document.frmcontact.txtname.focus();
		return false;
	}	
	var email = document.frmcontact.txtemail.value;
	if(email.length < 1)
	{
		alert("Please enter your Email id");
		document.frmcontact.txtemail.focus();
		return false;
	}
	if(isvalid_email(email) == false)
	{
		alert("Please check your Email id ");
		document.frmcontact.txtemail.focus();
		return false;
	}
	if(document.frmcontact.vercode.value=="")
	{
		alert("Please enter given code");
		document.frmcontact.vercode.focus();
		return false;
	}
	return true;
}
var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i;

function isvalid_email(str)
{
	return emailfilter.test(str);
}