function disableButtons(){
      var theForm = document.forms['aspnetForm'];
      if (!theForm) {
        theForm = document.aspnetForm;
      } 
      //alert(theForm.elements.length);
      for(var i=0;i<theForm.elements.length;i++){
        if(theForm.elements[i].type.toLowerCase() == "submit"){
          theForm.elements[i].style.visibility = "hidden";
          //theForm.elements[i].disabled = true;
          //alert(theForm.elements[i].value);
        }
      }
      return true;
    }
		
	  function addZip(f){
		  var z = f.zip.value;
		  if(z == '' || isNaN(z)){
		    alert(z + " Not a valid zip code")
			  return false;
	  	}
		  f.content.value += z;
			return true;
		}
		
		function toggleNav(){
		  if(document.getElementById("spanNav").style.visibility == "visible"){
		    document.getElementById("spanNav").style.visibility = "hidden";
			  document.getElementById("spanNav").style.position = "absolute";
			}else{
		    document.getElementById("spanNav").style.visibility = "visible";
			  document.getElementById("spanNav").style.position = "relative";
			}
		}