function Fn_Add()
{
	var first ="0"
	var second="0"
	var third="0"
	var fourth="0"
	var fifth="0"
			
	
  if(document.getElementById ("TextBox11").value!="")
	{
	first =document.getElementById ("TextBox11").value
	}
	else
	{
	document.getElementById("TextBox11").value="0"
	}
 if(document.getElementById ("TextBox12").value!="")
	{
	second=document.getElementById ("TextBox12").value
	}
	else
	{
	document.getElementById("TextBox12").value="0"
	}
 if(document.getElementById ("TextBox13").value!="")
	{
	third=document.getElementById ("TextBox13").value
	}
	else
	{
	document.getElementById("TextBox13").value="0"
	}
 if(document.getElementById ("TextBox14").value!="")
	{
	fourth =document.getElementById ("TextBox14").value
	}
	else
	{
	document.getElementById("TextBox14").value="0"
	}
 if(document.getElementById ("TextBox15").value!="")
	{
	fifth =document.getElementById ("TextBox15").value
	}
	else
	{
	document.getElementById("TextBox15").value="0"
	}
		
document.getElementById ("TextBox16").value=parseInt(first)+parseInt(second) + parseInt(third) + parseInt(fourth) + parseInt(fifth) 

	}
</script>