function chk(){
if(document.form.Name.value=="")
{
alert("Enter your Name");
document.form.Name.focus();
return false;
}
if(document.form.Company.value=="")
{
alert("Enter your Company Name");
document.form.Company.focus();
return false;
}
if(document.form.Address.value=="")
{
alert("Enter your Address");
document.form.Address.focus();
return false;
}
if(document.form.Phone.value=="")
{
alert("Enter your Phone No");
document.form.Phone.focus();
return false;
}


if (document.form.Phone.value.length!="")
	{
	   var cOK = "0123456789";
	   var cStr = document.form.Phone.value;
	   var ad = true;
	   for (i = 0;  i < cStr.length;  i++)
	      {
		  ch = cStr.charAt(i);
		  for (j = 0;  j < cOK.length;  j++)
		     if (ch == cOK.charAt(j))
			break;
		     if (j == cOK.length)
			{
			  ad = false;
			  break;
			}
	       }
	    if (!ad)
	       {
		  alert("Please enter only digits in the phone no field");
                  document.form.Phone.focus();
		   return (false);
	        }
	 } 		



if (document.form.Fax.value.length!="")
	{
	   var cOK1 = "0123456789";
	   var cStr1 = document.form.Fax.value;
	   var ad1 = true;
	   for (i = 0;  i < cStr1.length;  i++)
	      {
		  ch1 = cStr1.charAt(i);
		  for (j = 0;  j < cOK.length;  j++)
		     if (ch1 == cOK1.charAt(j))
			break;
		     if (j == cOK1.length)
			{
			  ad1 = false;
			  break;
			}
	       }
	    if (!ad1)
	       {
		  alert("Please enter only digits in the fax no field");
                  document.form.Fax.focus();
		   return (false);
	        }
	 }


if (document.form.Mobile.value.length!="")
	{
	   var cOK1 = "0123456789";
	   var cStr1 = document.form.Mobile.value;
	   var ad1 = true;
	   for (i = 0;  i < cStr1.length;  i++)
	      {
		  ch1 = cStr1.charAt(i);
		  for (j = 0;  j < cOK.length;  j++)
		     if (ch1 == cOK1.charAt(j))
			break;
		     if (j == cOK1.length)
			{
			  ad1 = false;
			  break;
			}
	       }
	    if (!ad1)
	       {
		  alert("Please enter only digits in the mobile no field");
                  document.form.Mobile.focus();
		   return (false);
	        }
	 }






if(document.form.Mail.value=="")
{
alert("Enter your Email id");
document.form.Mail.focus();
return false;
}
if(document.form.Mail.value!="")
{
at=document.form.Mail.value.indexOf('@',0)
if(at==-1){
alert("Not a valid Email id");
document.form.Mail.focus();
return false;
}
}
if(document.form.Mail.value!="")
{
dot=document.form.Mail.value.indexOf('.',0)
if(dot==-1){
alert("Not a valid Email id");
document.form.Mail.focus();
return false;
}
}

if(document.form.Feedback.value=="")
{
alert("Enter your Feedback");
document.form.Feedback.focus();
return false;
}




}