function IsNumeric(sText)
{
   var ValidChars = "0123456789.-";
   var IsNumber=true;
   var Char;
   for (j = 0; j < sText.length && IsNumber == true; j++) 
      { 
      Char = sText.charAt(j); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}
function chkfield()
{
var obj;
obj=document.form1;
	if(obj.Name2.value=="")
	{
	alert("Please enter Name");
	obj.Name2.focus();
	return false;
	}
	if(obj.Address2.value=="")
	{
	alert("Please enter Address");
	obj.Address2.focus();
	return false;
	}
	if(obj.PhoneNumber2.value=="")
	{
	alert("Please enter Phone Number");
	obj.PhoneNumber2.focus();
	return false;
	}
else
	{
	    if(!IsNumeric(obj.PhoneNumber2.value))
		{
		alert ("Please enter a valid Phone Number");
		obj.PhoneNumber2.focus();
		return false;
					
		}
	 if(obj.PhoneNumber2.value.length>12)
	  {
	  	alert ("Please enter a valid Phone Number, upto 12 digits can be used");
		obj.PhoneNumber2.value="";
		obj.PhoneNumber2.focus();
		return false;	
	  }	
	   
	}
	if(obj.Email2.value=="")
	{
	alert("Please enter Email id");
	obj.Email2.focus(); return false; 
	}
	else
	{
		var emailFilter=/^.+@.+\..{2,3}$/;
		if(!emailFilter.test(obj.Email2.value)) { 
		alert("Error: Invalid Email!"); 
		obj.Email2.focus(); return false; 
		}
	}
	if(obj.ChurchName2.value=="")
	{
	alert("Please enter Church Name");
	obj.ChurchName2.focus();
	return false;
	}
}