function element(id) {
 if(document.getElementById != null) {
  return document.getElementById(id);
 }
 if(document.all != null) {
  return document.all[id];
 }
 if(document.layers != null) {
  return document.layers[id];
 }
 return null;
}


navHover = function() {
    if(element('nav') != null) {
    	var lis = element('nav').getElementsByTagName('LI');
    	for (var i=0; i<lis.length; i++) {
    		lis[i].onmouseover=function() {
    			this.className+=' iehover';
    		}
    		lis[i].onmouseout=function() {
    			this.className=this.className.replace(new RegExp(' iehover\\b'), '');
    		}
    	}
    }
}
if (window.attachEvent) window.attachEvent('onload', navHover);

column_navHover = function() {
    if(element('column_nav') != null) {
    	var lis = element('column_nav').getElementsByTagName('LI');
    	for (var i=0; i<lis.length; i++) {
    		lis[i].onmouseover=function() {
    			this.className+=' subnavOn';
    		}
    		lis[i].onmouseout=function() {
    			this.className=this.className.replace(new RegExp(' subnavOn\\b'), '');
    		}
    	}
    }
}
if (window.attachEvent) window.attachEvent('onload', column_navHover);