/* vim: set ts=4 tw=0 sw=4 noet: */

function updateRowsPerPage() {
    var pos;
    var url;
    var base;
    var href;
    var link = document.getElementsByTagName('a');
    var found = false;
    var rowsPerPage = document.getElementById("rows");

    if (rowsPerPage.value == '') {
        rowsPerPage.value = '20';
    }
    for (var i = 0; i < link.length; i++) {
        url = link[i].href;
        pos = url.search('rowsperpage');
        if (pos >= 0) {
            found = true;
            base = url.slice(0, pos);
            href = base + 'rowsperpage=' + rowsPerPage.value;
            link[i].href = href;
        }
    }
    if (found == false) {
        pos = location.href.search('rowsperpage');
        if (pos >= 0) {
            base = location.href.slice(0, pos);
        } else {
            base = location.href;
        }
        if (base.charAt(base.length - 1) == '?') {
            href = base + 'rowsperpage=' + rowsPerPage.value;
        } else {
            href = base + '?rowsperpage=' + rowsPerPage.value;
        }
    } else {
        pos = location.href.search('rowsperpage');
        base = location.href.slice(0, pos);
        href = base + 'rowsperpage=' + rowsPerPage.value;
    }
    location.href = href;
}