'parentNode' is null or not an object error

**gits** · Dec 20 '07, 08:34 PM

hi ...

welcome to TSDN ...

probably headerLink is not a valid node ... so to be sure we need to see more of your code especially the code where headerLink gets assigned a node-reference ...

kind regards

**bent27** · Jan 31 '08, 09:24 PM

thank you for your reply gits, I hadn't logged in for quite a while, should I include the enitre script file? anyways, I have included it!!

[CODE=javascript]//BEGIN
addEvent(window , "load", sortables_init) ;

//Common Variables
var SORT_COLUMN_IND EX;
var oldRows = new Array();

//=============== =============== =============== =============== =============== ======
// This function will find all tables with class sortable and make them sortable
//=============== =============== =============== =============== =============== ======
function sortables_init( ) {
// Find all tables with class sortable and make them sortable
if (!document.getE lementsByTagNam e) return;
tbls = document.getEle mentsByTagName( "table");
var sortable =0;
for (ti=0;ti<tbls.l ength;ti++)
{
thisTbl = tbls[ti];
if (((' '+thisTbl.class Name+' ').indexOf("sor table") != -1) && (thisTbl.id))
{
sortable =1;
var headerTable = eval("document. all."+thisTbl.i d+"header"); //To get the header table
ts_makeSortable (headerTable,th isTbl); // Pass the header table and detail table

}
}
// get sortcolumn and sortarrow
// append sortcolumn to sa to get the column
if((document.fo rms[0].hidSortArrow.v alue == 'null') || (document.forms[0].hidSortArrow.v alue == "")){
document.forms[0].hidSortArrow.v alue="up";
document.forms[0].hidSortColumn. value=0;
}

var curValue = document.forms[0].hidSortArrow.v alue;
if(sortable ==1){
if (document.all.l ist_table.rows. length >1) {
ts_resortTable( eval('document. all.sa'+documen t.forms[0].hidSortColumn. value), document.all.li st_table);
if(curValue == "up"){
ts_resortTable( eval('document. all.sa'+documen t.forms[0].hidSortColumn. value), document.all.li st_table);
}
}
}

}
//=============== =============== =============== =============== =============== ======
// This function will make the tables sortable
//=============== =============== =============== =============== =============== ======

function ts_makeSortable (headerTable, detailTable) {
if (detailTable.ro ws.length<=1) return;
if (headerTable.ro ws && headerTable.row s.length > 0)
{
var firstRow = headerTable.row s[0];
}

if (!firstRow) return;

// We have a first row: assume it's the header, and make its contents clickable links
for (var i=0;i<firstRow. cells.length;i+ +)
{
var cell = firstRow.cells[i];
var txt = ts_getInnerText (cell);
//Set the hyperlink for the cell that contains the heading
cell.innerHTML = '<h1> <a href="#" id=sa'+i+' onclick="ts_res ortTable(this,d ocument.all.'+d etailTable.id+' );return false;">'+txt+' </a><span class="sortarro w"></span></h1>';
}
}
//=============== =============== =============== =============== =============== ======
//To get the inner text within a cell
//=============== =============== =============== =============== =============== ======
function ts_getInnerText (el){
if (typeof el == "string") return el;
if (typeof el == "undefined" ) { return el };
if (el.innerText) return el.innerText; //Not needed but it is faster
var str = "";

var cs = el.childNodes;
var l = cs.length;
for (var i = 0; i < l; i++) {
switch (cs[i].nodeType) {
case 1: //ELEMENT_NODE
str += ts_getInnerText (cs[i]);
break;
case 3: //TEXT_NODE
str += cs[i].nodeValue;
break;
}
}
return str;
}
//=============== =============== =============== =============== =============== ======
//To perform the sorting when clicked on the header links
//=============== =============== =============== =============== =============== ======
function ts_resortTable( headerLink,deta ilTable) {
// get the span
var span;
for (var ci=0;ci<headerL ink.parentNode. childNodes.leng th;ci++) {
if (headerLink.par entNode.childNo des[ci].tagName && headerLink.pare ntNode.childNod es[ci].tagName.toLowe rCase() == 'span') span = headerLink.pare ntNode.childNod es[ci];
}
var spantext = ts_getInnerText (span);
//var tcolumn = headerLink.pare ntNode.parentNo de;

var column = headerLink.pare ntNode.parentNo de.cellIndex; //Obtain the cell index of the cell whose hyperlink was clicked.
var table = detailTable;

document.forms[0].hidSortColumn. value=column;

// Work out a type for the column
if (table.rows.len gth <= 1) return;
var itm = ts_getInnerText (table.rows[1].cells[column]);

sortfn = ts_sort_caseins ensitive;
if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) sortfn = ts_sort_date;
if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) sortfn = ts_sort_date;
if (itm.match(/^\w\w\w\s\d\d[\/-]\d\d[\/-]\d\d\s\d\d\:\d\ d\s\w\w$/)) sortfn = ts_sort_date;
if (itm.match(/^\w\w\w\s\d\d[\/-]\d\d[\/-]\d\d\s\d\d\:\d\ d\s\w\w\s$/)) sortfn = ts_sort_date;
if (itm.match(/^[?$]/)) sortfn = ts_sort_currenc y;
if (itm.match(/^[\d\.]+$/)) sortfn = ts_sort_numeric ;

SORT_COLUMN_IND EX = column;

if(oldRows.leng th <= 0){
for (j=1;j<table.ro ws.length;j++)
{ oldRows[j-1] = table.rows[j]; }
}

var newRows = new Array();
for(i=0;i<oldRo ws.length;i++)
newRows[i] = oldRows[i];

newRows.sort(so rtfn);
if (span.getAttrib ute("sortdir") == null)
span.setAttribu te('sortdir','u p');

if (span.getAttrib ute("sortdir") == 'up') {
ARROW = '  <img src="img/down_arrow.jpg" align="center" border="0">';
newRows.reverse ();
span.setAttribu te('sortdir','d own');

} else {
ARROW = '  <img src="img/up_arrow.jpg" align="center" border="0">';
newRows.sort(so rtfn);
span.setAttribu te('sortdir','u p');
}

// ARROW=tcolumn.i nnerHTML;

document.forms[0].hidSortArrow.v alue=span.getAt tribute("sortdi r");

// We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
// don't do sortbottom rows
for (i=0;i<newRows. length;i++) { if (!newRows[i].className || (newRows[i].className && (newRows[i].className.inde xOf('sortbottom ') == -1))) table.tBodies[0].appendChild(ne wRows[i]);}
// do sortbottom rows only
for (i=0;i<newRows. length;i++) { if (newRows[i].className && (newRows[i].className.inde xOf('sortbottom ') != -1)) table.tBodies[0].appendChild(ne wRows[i]);}

// Delete any other arrows that may be showing
var allspans = document.getEle mentsByTagName( "span");
for (var ci=0;ci<allspan s.length;ci++) {
if (allspans[ci].className == 'sortarrow') {
if (getParent(alls pans[ci],"table") == getParent(heade rLink,"table")) { // in the same table as us?
allspans[ci].innerHTML = ' ';
}
}
}

// applying different back ground colors to alternate rows
for (j=1;j<table.ro ws.length;j++)
{
if(j%2 == 0){
table.rows[j].bgColor = "#FEFEF5";
} else {
table.rows[j].bgColor = "#BCD2EE";
}
}

span.innerHTML = ARROW;
}
//=============== =============== =============== =============== =============== ======
//To get the parent node
//=============== =============== =============== =============== =============== ======
function getParent(el, pTagName) {
if (el == null) return null;
else if (el.nodeType == 1 && el.tagName.toLo werCase() == pTagName.toLowe rCase()) // Gecko bug, supposed to be uppercase
return el;
else
return getParent(el.pa rentNode, pTagName);
}
//=============== =============== =============== =============== =============== ======
//To do the sorting based on date
//=============== =============== =============== =============== =============== ======
function ts_sort_date(a, b) {
// y2k notes: two digit years less than 50 are treated as 20XX, greater than 50 are treated as 19XX
aa = ts_getInnerText (a.cells[SORT_COLUMN_IND EX]);
bb = ts_getInnerText (b.cells[SORT_COLUMN_IND EX]);

if (aa.length >= 21 ) {
dt1 = aa.substr(10,2) +aa.substr(4,2) +aa.substr(7,2) +aa.substr(19,2 )+aa.substr(13, 2)+aa.substr(16 ,2) ;
}else if (aa.length == 10) {
dt1 = aa.substr(6,4)+ aa.substr(3,2)+ aa.substr(0,2);
} else {
yr = aa.substr(6,2);
if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
dt1 = yr+aa.substr(3, 2)+aa.substr(0, 2);
}
if (bb.length >= 21) {
dt2 = bb.substr(10,2) +bb.substr(4,2) +bb.substr(7,2) +bb.substr(19,2 )+ bb.substr(13,2) +bb.substr(16,2 );
}else if (bb.length == 10) {
dt2 = bb.substr(6,4)+ bb.substr(3,2)+ bb.substr(0,2);
} else {
yr = bb.substr(6,2);
if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
dt2 = yr+bb.substr(3, 2)+bb.substr(0, 2);
}

if (dt1==dt2) return 0;
if (dt1<dt2 ) return -1;

return 1;
}
//=============== =============== =============== =============== =============== ======
//To sort based on currency
//=============== =============== =============== =============== =============== ======
function ts_sort_currenc y(a,b) {
aa = ts_getInnerText (a.cells[SORT_COLUMN_IND EX]).replace(/[^0-9.]/g,'');
bb = ts_getInnerText (b.cells[SORT_COLUMN_IND EX]).replace(/[^0-9.]/g,'');
return parseFloat(aa) - parseFloat(bb);
}
//=============== =============== =============== =============== =============== ======
//To sort numeric values
////=============== =============== =============== =============== =============== ======
function ts_sort_numeric (a,b) {
aa = parseFloat(ts_g etInnerText(a.c ells[SORT_COLUMN_IND EX]));
if (isNaN(aa)) aa = 0;
bb = parseFloat(ts_g etInnerText(b.c ells[SORT_COLUMN_IND EX]));
if (isNaN(bb)) bb = 0;
return aa-bb;
}
//=============== =============== =============== =============== =============== ======
//To sort based on caseinsensitive
//=============== =============== =============== =============== =============== ======
function ts_sort_caseins ensitive(a,b) {
aa = ts_getInnerText (a.cells[SORT_COLUMN_IND EX]).toLowerCase() ;
bb = ts_getInnerText (b.cells[SORT_COLUMN_IND EX]).toLowerCase() ;
if (aa==bb) return 0;
if (aa<bb) return -1;
return 1;
}
//=============== =============== =============== =============== =============== ======
//To sort on a default column
//=============== =============== =============== =============== =============== ======
function ts_sort_default (a,b) {
aa = ts_getInnerText (a.cells[SORT_COLUMN_IND EX]);
bb = ts_getInnerText (b.cells[SORT_COLUMN_IND EX]);
if (aa==bb) return 0;
if (aa<bb) return -1;
return 1;
}
//=============== =============== =============== =============== =============== ======
//The function is called when the page is loaded
//=============== =============== =============== =============== =============== ======
function addEvent(elm, evType, fn, useCapture)
// addEvent and removeEvent
// cross-browser event handling for IE5+, NS6 and Mozilla

{
if (elm.addEventLi stener){
elm.addEventLis tener(evType, fn, useCapture);
return true;
} else if (elm.attachEven t){
var r = elm.attachEvent ("on"+evType , fn);
return r;
} else {
alert("Handler could not be removed");
}
}
//=============== =============== =============== =============== =============== ======
//The function is called when the page is loaded
//=============== =============== =============== =============== =============== ======
function doAlert() {
alert("ContextP ath is: " + context_path);
}
//END[/CODE]

'parentNode' is null or not an object error

'parentNode' is null or not an object error

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