Error in my javascript file

programming web dev
1

Hey guys,

I don’t understand how to fix this, it works fine in Firefox but when IE tries to use this file it gives me an error and says that “childNodes.0.tagName is null or not a tag name”. Any help would be great!! Here is the .js file script:


<script type="text/javascript">
   var elem = "TR"; 
   var rClick;
 window.onload = function(){
  if(document.getElementsByTagName){
   var el = document.getElementsByTagName(elem);
    for(var i=0; i<el.length; i++){
    if(el*.childNodes[0].tagName != "TH"
      && el*.parentNode.parentNode.className.indexOf("tbl") != -1){
     if(i%2 == 1){
      el*.className = "on";
      el*.oldClassName = "on";
      el*.onmouseout  = function(){
	     this.className = "on";
      }
    } else {
      el*.className = "off";
      el*.oldClassName = "off";
      el*.onmouseout  = function(){
	     this.className = "off";
      }
    }
      el*.onmouseover = function(){
	     if(this.className == this.oldClassName)
	       {this.className = "hover";}
	     if(this.onmouseout == null && this.className != "click"){
    	    this.onmouseout = function(){
        	    this.className = this.oldClassName;
    	    }
	     }
      }
      el*.onclick = function(){
          if(this.className != "click"){
             this.className = "click";
          } else {
             this.className = this.oldClassName;
          }
        this.onmouseout = null;
       }
    }
   }
  }
 }
</script>
2

can you supply a test page to show where this isn’t working? the standards when working with nodes gets a little tricky sometimes between IE and other browsers.