//Script for unlocking new form fields

var reqrows = 1; // the default number of rows

function drawoptions()

{
    var div = document.getElementById("formDiv");
    var numtounlock = parseInt(document.getElementById("adultpax").value + "") + parseInt(document.getElementById("childpax").value + "") + parseInt(document.getElementById("infantpax").value + "");

// if they've selected to show more rows, then we add more rows
    if(numtounlock = 2)
    {
       		document.getElementById("passdiv2").style.visibility = "visible";
			document.getElementById("passdiv3").style.visibility = "hidden";
			document.getElementById("passdiv4").style.visibility = "hidden";
			document.getElementById("passdiv5").style.visibility = "hidden";
			document.getElementById("passdiv6").style.visibility = "hidden";
			document.getElementById("passdiv7").style.visibility = "hidden";
			document.getElementById("passdiv8").style.visibility = "hidden";
			document.getElementById("passdiv9").style.visibility = "hidden";
			document.getElementById("passdiv10").style.visibility = "hidden";
    }
	if(numtounlock = 3)
    {
       		document.getElementById("passdiv3").style.visibility = "visible";
			document.getElementById("passdiv4").style.visibility = "hidden";
			document.getElementById("passdiv5").style.visibility = "hidden";
			document.getElementById("passdiv6").style.visibility = "hidden";
			document.getElementById("passdiv7").style.visibility = "hidden";
			document.getElementById("passdiv8").style.visibility = "hidden";
			document.getElementById("passdiv9").style.visibility = "hidden";
			document.getElementById("passdiv10").style.visibility = "hidden";
    }

    if(numtounlock = 4)
    {
       		document.getElementById("passdiv4").style.visibility = "visible";
			document.getElementById("passdiv5").style.visibility = "hidden";
			document.getElementById("passdiv6").style.visibility = "hidden";
			document.getElementById("passdiv7").style.visibility = "hidden";
			document.getElementById("passdiv8").style.visibility = "hidden";
			document.getElementById("passdiv9").style.visibility = "hidden";
			document.getElementById("passdiv10").style.visibility = "hidden";
    }

    if(numtounlock = 5)
    {
       		document.getElementById("passdiv5").style.visibility = "visible";
			document.getElementById("passdiv6").style.visibility = "hidden";
			document.getElementById("passdiv7").style.visibility = "hidden";
			document.getElementById("passdiv8").style.visibility = "hidden";
			document.getElementById("passdiv9").style.visibility = "hidden";
			document.getElementById("passdiv10").style.visibility = "hidden";
    }

    if(numtounlock = 6)
    {
       		document.getElementById("passdiv6").style.visibility = "visible";
			document.getElementById("passdiv7").style.visibility = "hidden";
			document.getElementById("passdiv8").style.visibility = "hidden";
			document.getElementById("passdiv9").style.visibility = "hidden";
			document.getElementById("passdiv10").style.visibility = "hidden";
    }
	if(numtounlock = 7)
    {
       		document.getElementById("passdiv7").style.visibility = "visible";
			document.getElementById("passdiv8").style.visibility = "hidden";
			document.getElementById("passdiv9").style.visibility = "hidden";
			document.getElementById("passdiv10").style.visibility = "hidden";
    }
	if(numtounlock = 8)
    {
       		document.getElementById("passdiv8").style.visibility = "visible";
			document.getElementById("passdiv9").style.visibility = "hidden";
			document.getElementById("passdiv10").style.visibility = "hidden";
    }
	if(numtounlock = 9)
    {
       		document.getElementById("passdiv9").style.visibility = "visible";
			document.getElementById("passdiv10").style.visibility = "hidden";
    }
	if(numtounlock >= 10)
    {
       		document.getElementById("passdiv10").style.visibility = "visible";
    }

		
    // they've decided to show less rows, so we remove some
    else
    {
        for(var i=0; i<reqrows - numtounlock; i++)
        {
            document.getElementById("passName" + i).disabled = true;
        }

    }

}

window.onload = drawoptions;