function valid()

{



	

	  if(document.form1.txt_quantity.value=="")



     {



     alert("Enter Quantity");



     document.form1.txt_quantity.focus();



     return false;



      }

	  if(document.getElementById('txt_quantity').value.length>0 && isNaN(document.getElementById('txt_quantity').value)==true)

	  {

	  alert("Please Enter Quantity in Numbers");

	  document.form1.txt_quantity.focus();

	  return false;

	  }

	   if(document.form1.txt_email.value=="")



     {



     alert("Please Enter Email");



     document.form1.txt_email.focus();



     return false;



      }

	 

	 if(document.form1.txt_confirmemail.value=="")



     {



     alert("Please Enter ConfirmEmail");



     document.form1.txt_confirmemail.focus();



     return false;



      }

	 if(document.form1.txt_email.value!=document.form1.txt_confirmemail.value)

	  {

	   alert("Entered Email doesn't match");



     document.form1.txt_confirmemail.focus();



     return false;

	}

   

}