function checkvalid()
{

	if(Trim(document.frmOrder.vOrderNo.value) == "")
	{
		alert("Please Enter Order Number") ;
		document.frmOrder.vOrderNo.focus() ;
		return false;
	}
	if(Trim(document.frmOrder.vEmail.value).length < 1)
	{
		alert("Please Enter Email Address");
		document.frmOrder.vEmail.focus();
		return false;
	}
	if(!isValidEmail(document.frmOrder.vEmail.value))	
	{
		document.frmOrder.vEmail.focus();
		return false;
	}
	document.frmOrder.submit() ;
}