null or not an object in IE

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  • macaco
    New Member
    • Apr 2007
    • 9
    #1

    null or not an object in IE

    I have developed a webapp that works very good on firefox and opera, but on IE I keep getting an error message.

    I use AJAX to communicate with a PHP file that queries a MySQL database and returns the information in JSON.
    Code:
    function sendQuerystring2(url,mod,columna)
{
	http2.open("GET", url, true);
	if (mod == "tabla") {
		http2.onreadystatechange = function (){
			if (http2.readyState == 4) {
				hide('cargando');
				if (http2.status == 200) {
					obj_detalle = eval('(' + http2.responseText + ')');
					crear_tabla(columna);
				}
			} else {
				show('cargando');
			}
		}	
	}
    Code:
    {"items":[{"id":"1","titulo":"Prueba"}]}
    obj_detalle['items'][0].id, is "null or not an object" in IE, while in firefox works perfectly.

    I have tried an alert(http2.res ponseText) and it has the correct content.

    does anyone know a fix to this?
    many thanks.
    Tags: None
    • iam_clint
      Recognized Expert Top Contributor
      • Jul 2006
      • 1207
      #2
      why are you using eval?

        Comment

        • macaco
          New Member
          • Apr 2007
          • 9
          #3
          Originally posted by iam_clint
          why are you using eval?
          because it's the way to use JSON. it turns the sent string into a javascript object.

          I have also tried with POST instead of GET.. but still getting the same results.

            Comment

            • iam_clint
              Recognized Expert Top Contributor
              • Jul 2006
              • 1207
              #4
              i guess i don't understand why a string needs to be an object?

                Comment

                • macaco
                  New Member
                  • Apr 2007
                  • 9
                  #5
                  because it's not only this:

                  {"items":[{"id":"1","titu lo":"Prueba"}]}

                  there are many items with many other "properties ". and I think this is the best way to parse this information. something similar to XML in a way. I can access any property like this:

                  obj_detalle.ite ms[itemNumber].property

                  though I it is not working on IE.

                    Comment

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