function addOption(selectbox,text,value )
{
var optn = document.createElement("option");
optn.text = text;
optn.value = value;
selectbox.options.add(optn);
}


function getNetwork(network_type) 


	{
		var network_type = document.eds.network_type.value;
		switch(network_type) 
		{
			case "ControlNet":
				var device = new Array("--Select a Device Type--","Chassis ","February","March","April","May","June","July","August","September","October","November","December"); 
				for (var i=0; i < device.length;++i){

				addOption(document.eds.device_type, device[i], device[i]);
				}

			break
			case "DeviceNet":
			var device = new Array("--Select a Device Type--","Snot ","February","March","April","May","June","July","August","September","October","November","December"); 
				for (var i=0; i < device.length;++i){

				addOption(document.eds.device_type, device[i], device[i]);
				}
			break
			case "EtherNet\/IP":
			alert("EtherNet");
			break
			case "Independent Network":
			alert("Independent ");
			break
			default:
			alert("default");
		}
	}