<!--- JavaScript (c) Amit Arora <amit.arora@bigfoot.com> --->

    ns4 = (document.layers)? true:false;
    ie4 = (document.all)? true:false;

    if (ie4) {
    	if (navigator.userAgent.indexOf('MSIE 5')>0) {
    		ie5 = true;
    	} else {
    		ie5 = false; }
    } else {
    	ie5 = false;
    }

  	function getRandom( num )
  	{
  	  	today = new Date();
  			randomNum = 1 + (today.getSeconds() % (num));

  		return (randomNum);
  	};

    function showhide( sobj )
    {
    	var obj;
    	if (ns4)
    	{
    		obj = document.layers[sobj];
    		if (obj.visibility == "hide") { obj.visibility = "show" }
    		else { obj.visibility = "hide" };
    	};
    	if (ie4)
    	{
    		obj = eval(sobj);
    		if (obj.style.display == "none") {obj.style.display = ""}
    		else {obj.style.display = "none"};
    	};
    }

    function exp_expall()
    {
    	if (typeof itemlist != 'undefined')
    	{
    		var i;
    		for(i=0; i < maxitem; i++)
    		{
    			eval(itemlist[i]).style.display = '';
    		}
    	}
    };

    function exp_colall()
    {
    	if (typeof itemlist != 'undefined')
    	{
    		var i;
    		for(i=0; i < maxitem; i++)
    		{
    			eval(itemlist[i]).style.display = 'none';
    		}
    	}
    };

    function exp_revall()
    {
    	if (typeof itemlist != 'undefined')
    	{
    		var i;
    		for(i=0; i < maxitem; i++)
    		{
    			showhide( itemlist[i] );
    		}
    	}
    };