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IF statement to select nodes w/certain attribute values

57 New Member
Hi,
I'm trying to add an IF statement to this javascript that will select/display only those xml nodes either with a certain attribute or attribute value.

Here's my xml code:

Expand|Select|Wrap|Line Numbers
  1. <stations>
  2.     <station timezone="PT" PT="">
  3.         <city>Seattle</city>
  4.         <freq>93.1 FM</freq>
  5.     </station>
  6.     <station timezone="MT" MT="">
  7.         <city>Phoenix</city>
  8.         <freq>95.7 FM</freq>
  9.     </station>
  10.     <station timezone="CT" CT="">
  11.         <city>Nashville</city>
  12.         <freq>99.9 FM</freq>
  13.     </station>
  14.     <station timezone="ET" ET="">
  15.         <city>Atlanta</city>
  16.         <freq>107.9 FM</freq>
  17.     </station>
  18. </stations>
  19.  
I've got two different ways to denote the timezone because I've gotten one IF statement to work in Firefox but not IE6, and a different script (using xpath) that works in IE6 but not Firefox (it appears the xpath isn't working in FF).

Here's the one that works in FF (but not IE6):

Expand|Select|Wrap|Line Numbers
  1. <script type="text/javascript">
  2.     xmlDoc=loadXMLDoc("stations.xml");
  3.     x=xmlDoc.getElementsByTagName("city");
  4.     for (i=0;i<x.length;i++)
  5.         {
  6.         if (x[i].parentNode.hasAttribute("MT"))
  7.             {
  8.             document.write(x[i].childNodes[0].nodeValue)
  9.             document.write("<br />")
  10.             }
  11.         }
  12. </script>
  13.  
And here's the one that works in IE6 (but not FF):

Expand|Select|Wrap|Line Numbers
  1. <script type="text/javascript">
  2.     xmlDoc=loadXMLDoc("stations.xml");
  3.     xmlDoc.setProperty("SelectionLanguage", "XPath");
  4.     x=xmlDoc.selectNodes("//station[@tmzn='MT']/city");
  5.     for (i=0;i<x.length;i++)
  6.         {
  7.         document.write(x[i].childNodes[0].nodeValue)
  8.         document.write("<br />")
  9.         }
  10. </script>
  11.  
And for further reference, here's my external javascript file I'm using to help load the xml:

Expand|Select|Wrap|Line Numbers
  1. function loadXMLDoc(dname)
  2. {
  3. var xmlDoc;
  4. // code for IE
  5. if (window.ActiveXObject)
  6. {
  7. xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
  8. }
  9. // code for Mozilla, Firefox, Opera, etc.
  10. else if (document.implementation && document.implementation.createDocument)
  11. {
  12. xmlDoc=document.implementation.createDocument("","",null);
  13. }
  14. else
  15. {
  16. alert('Your browser cannot handle this script');
  17. }
  18. xmlDoc.async=false;
  19. xmlDoc.load(dname);
  20. return(xmlDoc);
  21. }
  22.  
Is there an IF statement that will work in both (maybe even in Safari, too?) or is there a way to use xpath so it will work in FF? I'm new to this, so it's kinda confusing.

Thanks!
May 19 '07 #1
11 4790
acoder
16,027 Recognized Expert Moderator MVP
I don't know if this will do what you want, but you could work with this example.
May 21 '07 #2
npm
57 New Member
Not exactly...
Sorry I should have been more clear on what I'm trying to get this script to do. I was hoping to have it go through the xml file and display only those cities (or frequencies) that are in a certain timezone.

Do I have the xml set up wrong? Should I put the timezone as another child element of <station> instead as an attribute of <station>? Would that make it easier to come up with a javascript that can sort that out?

Thanks, every little bit helps since I'm new to xml and still fairly new to javascript.
May 21 '07 #3
acoder
16,027 Recognized Expert Moderator MVP
Not exactly...
Sorry I should have been more clear on what I'm trying to get this script to do. I was hoping to have it go through the xml file and display only those cities (or frequencies) that are in a certain timezone.

Do I have the xml set up wrong? Should I put the timezone as another child element of <station> instead as an attribute of <station>? Would that make it easier to come up with a javascript that can sort that out?

Thanks, every little bit helps since I'm new to xml and still fairly new to javascript.
Yes, perhaps that should solve your problem. Is the xml just an example or do you expect that multiple stations will have the same timezone? Perhaps you could ask about the XML element of this problem in the XML forum?
May 21 '07 #4
iam_clint
1,208 Recognized Expert Top Contributor
you can use an attribute


element.getAttr ibute("timezone ");
May 21 '07 #5
npm
57 New Member
Yes, I will have multiple stations in multiple states, but I also want to list the stations in pages corresponding to their timezone. The problem arises when one state has stations in more than one timezone. I haven't found/come up with a javascript that will display a city based on what timezone it's in, at least a script that will work in Firefox & IE or other browsers as well.

Thanks!
May 21 '07 #6
npm
57 New Member
you can use an attribute


element.getAttr ibute("timezone ");
Where would I put that in a script?
Thanks!
May 23 '07 #7
npm
57 New Member
I'm not sure if this is the correct place to put the if statement, but I tyring to find an if statement to display only those <city> elements whose parent node <station> has a specific attribute value (in this case either Central or Eastern timezone).

Expand|Select|Wrap|Line Numbers
  1. <script type="text/javascript">
  2. <!--
  3.     xmlDoc=loadXMLDoc("stations.xml");
  4.     x=xmlDoc.getElementsByTagName("city");
  5.     for (i=0;i<x.length;i++)
  6.         {
  7.         if (x[i].parentNode.WHAT_GOES_HERE?)
  8.             {
  9.             document.write(x[i].childNodes[0].nodeValue)
  10.             document.write("<br />")
  11.             }
  12.         }
  13. //-->
  14. </script>
  15.  
Here's a sample xml file it would be selecting from:
Expand|Select|Wrap|Line Numbers
  1. <stations>
  2.     <station timezone="Eastern">
  3.         <city>Chattanooga</city>
  4.         <freq>99.9 FM</freq>
  5.     </station>
  6.     <station timezone="Eastern">
  7.         <city>Knoxville</city>
  8.         <freq>107.9 FM</freq>
  9.     </station>
  10.     <station timezone="Central">
  11.         <city>Memphis</city>
  12.         <freq>93.1 FM</freq>
  13.     </station>
  14.     <station timezone="Central">
  15.         <city>Nashville</city>
  16.         <freq>95.7 FM</freq>
  17.     </station>
  18. </stations>
  19.  
May 23 '07 #8
gits
5,390 Recognized Expert Moderator Expert
hi ...

it's the right place :) and WHAT_GOES_HERE has to be:

Expand|Select|Wrap|Line Numbers
  1. // when you want to get the EASTERN-zone
  2. x[i].parentNode.getAttribute('timezone') == 'Eastern'
  3.  
kind regards ...
May 23 '07 #9
gits
5,390 Recognized Expert Moderator Expert
Where would I put that in a script?
Thanks!
have a look at your other posting that concerns the same issue ...

kind regards ...
May 23 '07 #10

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