var bob = 0;
		function nav_check() {
	    	if (!document.getElementsByTagName){
    	    	return;
    		}
    		var u_list;
    		var pattern1 = 'nav_';
    		var pattern2 = /<li/i;
    		var all_uls = document.getElementsByTagName('ul');
    		for (var i=0; i<all_uls.length; i++){
        		u_list = all_uls[i];
        		if(u_list.id.match(pattern1)) {
        		
        			strng = u_list.innerHTML;
        			if(!(strng.match(pattern2))) {
        			u_list.className = "none";
        			}
        		}
        	}
			if (!document.getElementById){
				return;
			}
			if(document.getElementById('tags')){
				if(document.getElementById('tags').innerHTML){
					document.getElementById('tag_wrap').style.visibility = "visible";
				}
			}
		}
		window.onload = nav_check;