gistfile1.js

function getDPDiopterDetails(obj) {
	var a = obj.id;
	var rptIndex = a.substring(0, a.indexOf("ddlDPModel"));

	var userID = document.getElementById("ctl00_cMainContent_tbHiddenUserID").value;
	var modelElement = document.getElementById(rptIndex + "ddlDPModel");
	var diopterElement = document.getElementById(rptIndex + "ddlDPDiopters");
	var productIDElement = document.getElementById(rptIndex + "tbDPHiddenProductID");

	productIDElement.value = "-1";
	diopterElement.options.length = 0;
	diopterElement.add(new Option("Diopter", "-1"));

	ImplantDetails.GetPricedDiopters(rptIndex, userID, modelElement.value, onDPDiopterComplete);
}