JavaScript
Contents |
Functions that should be in JavaScript, but aren't
XMLHttpRequest
Cross-Browser Support
if( typeof XMLHttpRequest == "undefined" ) { XMLHttpRequest = function() { try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); } catch(e) {}; try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); } catch(e) {}; try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch(e) {}; try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {}; throw new Error("This browser does not support XMLHttpRequest or XMLHTTP."); } }
Then, when creating the object, you simply need
var request = new XMLHttpRequest(); // No conditionals necessary.
Caching
When using GET, caching may become an issue. One simple way of getting around this is to use POST for everything. The Wikipedia article above details other methods.
Looping through an object's properties
for (var name in myObject) { alert("The property " + name + " is equal to " + myObject[name]); }
Creating HTML Elements
document.createElement('name');
Then you can set things like cellSpacing, style.border, style.backgroundColor, etc.
actb.js uses this method to generate the autocomplete box.
Foreach Loops
Use this instead:
for (var x in myObject) { alert(myObject[x]); }
