var agt = navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_nav = ((agt.indexOf('mozilla') != -1) && (agt.indexOf('spoofer') == -1) && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera') == -1) && (agt.indexOf('webtv') == -1));
var is_nav4up = (is_nav && (is_major >= 4));
var is_ie = (agt.indexOf("msie") != -1);
var is_ie3  = (is_ie && (is_major < 4));
var is_ie4  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5") == -1) && (agt.indexOf("msie 6") == -1));
var is_ie4up = (is_ie && (is_major >= 4));
var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4);
var is_mac = (agt.indexOf("mac") != -1);
var is_gecko = (agt.indexOf("gecko") != -1);

function grabObject (id) {
	/*
    if (is_ie4) {
        var view = eval(id);
    }    
    if (is_ie5up || is_gecko) {

        var view = document.getElementById(id);

    }  
    */ 
	var view = document.getElementById(id); 
    return view;
}

    
function show_hide(id) {    
    if(is_ie4up || is_gecko) {        
        var hdn_div = grabObject('hdn'+id);        
        var shdn_span = grabObject('shdn'+id);
        if(hdn_div.style.display == 'block') {            
            hdn_div.style.display = 'none';                
        } else {                
            hdn_div.style.display = 'block';
            //eval("document.v_" + id + ".src='images/v.gif'");                
        }        
    }    
}

function open_div(number, default_status) {        
    if (is_ie4up || is_gecko) {            
        document.writeln("<div id='hdn" + number + "' name='hdn" + number + "' style='display: " + default_status + ";'>");        
    }    
}

function close_div(number) {        
    if (is_ie4up || is_gecko) {            
        document.writeln("</div>");        
    }    
}