diff --git a/application/default/views/scripts/search/advance.phtml b/application/default/views/scripts/search/advance.phtml
index 306334a8..70e861f4 100644
--- a/application/default/views/scripts/search/advance.phtml
+++ b/application/default/views/scripts/search/advance.phtml
@@ -93,10 +93,10 @@ function InputValueChange(){
   var p4=new TLngLat($(input.east).val(),$(input.south).val());
   map.setViewport(new Array(p1,p2,p3,p4));
 
-  var west=$(input.west).val();
-  var east=$(input.east).val();
-  var north=$(input.north).val();
-  var south=$(input.south).val();
+  var west=parseFloat($(input.west).val());
+  var east=parseFloat($(input.east).val());
+  var north=parseFloat($(input.north).val());
+  var south=parseFloat($(input.south).val());
   var bounds = new TBounds(west,south,east,north);
   rect = new TRect(bounds);
   map.addOverLay(rect);