function checkit()
{
  if(document.form1.name.value=="")
  {
  alert("Please Fill Your Good Name");
  document.form1.name.focus();
  return false;
  }
  if(document.form1.email.value=="")
  {
  alert("Please Fill Your E-mail Address");
  document.form1.email.focus();  
  return false;
  }
  if(document.form1.email.value.indexOf("@")<=0 || document.form1.email.value.indexOf(".")<=0)
  {
  alert("Please Fill Your Valid E-mail Address");
    document.form1.email.focus();
  return false;
  }
  	if(document.form1.phone.value!="")
	{
			if(isNaN(document.form1.phone.value))
		{
			alert("Please Enter Numeric Values in Phone Field");
			document.form1.phone.focus();
			return false;
		}
	
			if(document.form1.phone.value.length < 6)
		{
			alert("Please Enter Valid Phone No");
			document.form1.phone.focus();
			return false;
		}
	}

	if(document.form1.fax.value!="")
	{
	 		if(isNaN(document.form1.fax.value))
	 	{
			alert("Please Enter Numeric Values in Fax Field");
			document.form1.fax.focus();
			return false;
		}
			if(document.form1.fax.value.length < 10)
		{
			alert("Please Enter Valid Fax No");
			document.form1.fax.focus();
			return false;
		}
	}
	
	if(document.form1.comment.value=="")
	{
		alert("Please Enter Your Comments");
		document.form1.comment.focus();
		return false;
	}
}