function getPostcodes(thisis,e){
   //Cancel the link behavior
		e.preventDefault();
		document.getElementById("dialog_inner").innerHTML="";
    getAjax("dialog_inner", "ajax_setpostcode.php","location", document.getElementById("j_location").value);		

    //document.getElementById("j_search_form").submit();

		//Get the A tag
		var id = $(thisis).attr('href');
	
		//Get the screen height and width
		var maskHeight = $(document).height();
		var maskWidth = $(window).width();
	
		//Set heigth and width to mask to fill up the whole screen
		$('#mask').css({'width':maskWidth,'height':maskHeight});
		
		//transition effect		
		$('#mask').fadeIn(1000);	
		$('#mask').fadeTo("slow",0.8);	
	
		//Get the window height and width
		var winH = $(window).height();
		var winW = $(window).width();
              
		//Set the popup window to center
		$(id).css('top',  winH/2-$(id).height()/2);
		$(id).css('left', winW/2-$(id).width()/2);
	
		//transition effect
		$(id).fadeIn(2000); 
}
$(document).ready(function() {	
	//select all the a tag with name equal to modal
	$('.modal').click(function(e) {
      if ($("#j_location").val() != ""){
        if ($("#j_miles").val() == "select"){
           alert("You need to select a distance.");
        }else{getPostcodes(this,e);}
      }else{
        document.getElementById("j_search_form").submit();
      }
	});
	
	//if close button is clicked
	$('.close').click(function (e) {
		//Cancel the link behavior
		e.preventDefault();
		
		$('#mask').hide();
		$('.window').hide();
	});		
	
	//if mask is clicked
	$('#mask').click(function () {
		$(this).hide();
		$('.window').hide();
	});			
	
});