var seclist = document.getElementById('sectorlist');
var subseclist = document.getElementById('subsectorlist');

function updateSubSectors( sector,script ) {
	if( sector > 0 ) {
		subseclist.options.length = 0
		new Ajax.Request( script, { method:'get',
			parameters: { sector: seclist.options[ sector ].text },
    	onSuccess: function(oReq){
    		//alert(oReq.responseText);
    		var data = eval(oReq.responseText);
    		if( data.length > 0 ) {
    			subseclist.options[ subseclist.options.length ] 
    							= new Option( "--Select Subsector--","default" );
    			for (var i = 0; i < data.length; i++) {
      			subseclist.options[ subseclist.options.length ] 
      							= new Option( data[i], data[i] );
      		}
      		subseclist.disabled=false;
      	} else {
      		subseclist.options[ subseclist.options.length ] 
      							= new Option( "None available", "default" );
      		subseclist.disabled=true;	
      	}

    	},
    	onFailure: function() { 
    		alert('Something went wrong...');
    		subseclist.disabled=true;
    	}
  	});


	} else {
		subseclist.disabled=true;
	}
}