Question

I’m trying to bind a page initialize event from, afaik, jquerymobile, to a method so I can set my header, this is done, because later I wish to set it dynamically.
But my event doesn’t even trigger :’-(
Any help would be appreciated.

$('#mapmode').bind('pageinit', function(event) {
    initPageHeader();
});

function initPageHeader(){
    alert('oldhtml');
    var oldhtml=document.getElementById('header').innerHTML;
    document.getElementById('header').innerHTML="";
    var html = oldthml + '<a href="#" data-rel="back" data-role="button" ><img'+
    ' align="middle"src="../images/back.png" alt="back" vspace="2"/></a><h1>'+
    '<img align="middle"src="../images/main_header.png" alt="logo" vspace="2"/>'+
    '</h1><a href="#first" data-role="button" data-inline="true">'+
    '<img align="middle"src="../images/home.png" '+
    'alt="picture to take you to the first page"/></a>'
    document.getElementById('header').innerHTML=html;
}

Answer 1

If you want to bind to pageinit instead of using event delegation, you have to do that on the document itself:

$(document).on("pageinit", function(event) {
    initPageHeader();
});

If this behavior is specific to the #mapmode page, then event delegation is the way to go:

$(document).on("pageinit", "#mapmode", function(event) {
    initPageHeader();
});

In passing, proper use of jQuery can make your event handler shorter and more readable:

function initPageHeader()
{
    $("#header").html(function(index, originalMarkup) {
        return originalMarkup
            + '<a href="#" data-rel="back" data-role="button">'
            + '<img align="middle" src="../images/back.png" alt="back" '
            + 'vspace="2"/></a><h1><img align="middle" '
            + 'src="../images/main_header.png" alt="logo" vspace="2"/>'
            + '</h1><a href="#first" data-role="button" data-inline="true">'
            + '<img align="middle"src="../images/home.png" '
            + 'alt="picture to take you to the first page"/></a>';
    });
}