$(document).ready(function()
{  
	//define config object
	var dialogOpts = {
	modal: true,
	width: 400,
	closeOnEscape: true, 
	overlay: {},	
	hide: true,
	show: true,
	autoOpen: false
	};
	//create the dialog
	$("#popup").dialog(dialogOpts);
				
	//define click handler for button
	$("#toelichting").click(function() {
					
	//open the dialog
	$("#popup").dialog("open");
	});	

    //create the dialog
    $("#popup").dialog();
	  
	
});