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'name' is null or not an object

Last Modified: 2012-06-27
Hello I continuously keep getting this error in IE, while everything works in FF. I am trying to rename elements while I swap rows. All my elements have IDs. All elements except for divs, do not have names, so I get all elements by tag name from a row and perform my processing. But here in IE it gives me a problem when I try to replace name, for elements where name is null, I have a condition to prevent making any change, but this error pops up at the condition. Is there any way around for this problem??
var row= document.getElementById(row.id);
var elems = row.getElementsByTagName('*');
var r = explodeArray(row.id, "_");
var vtLineNum = Number(r[1]);
var vtName = r[0];
	for(var i in elems)
		if(elems!=null &&  elems[i]!=null && elems[i].id!=null && elems[i].id!='')
				elems[i].id = replaceNum(elems[i].id, vtLineNum);
				if(elems[i].name !=null && elems[i].name !='')
					{elems[i].name = replaceNum(elems[i].name, vtLineNum);}

					var children = document.getElementById(elems[i].id).childNodes;
						for(var i in children)		
							if(children[i].href != null)			
							children[i].href = replaceNum(children[i].href, vtLineNum);

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