var subscribe_check = 0;

function subscribe_clearall()
{
    var form = document.getElementById("subscribe_form");
    
    elts = form.getElementsByTagName("input");
    
    for(var i = 0; i < elts.length; i++)
    {
        if(elts[i].type=="checkbox")
            if(subscribe_check == 0)
                elts[i].checked = true;
             else
                elts[i].checked = false;
                
    }
    
    if(subscribe_check == 0)
        subscribe_check = 1;
    else
        subscribe_check = 0;
}

function changeTab(id, id2, td)
{
    sh = document.getElementById("tabbed_block_" + id);
    sh2 = document.getElementById("tabbed_block_" + id2);
    
    sh.className = "none_visible";
    sh2.className = "";
    
    td.parentNode.className="active";
    t2 = document.getElementById("tab" + id);
    t2.className = "none_active";
}

function inc(f)
{
    eval("var numb = document.forms." + f + ".num;");
    l = parseInt(numb.value);

    eval("var input = document.forms." + f + ".page;");
    n = input.value;

    if(!isNaN(n))
    {
        if(n < l)
            input.value = parseInt(n) + 1;
    }
    else 
        input.value = "1";
}

function inc_page (elem_name, pages)
{
		active_page=document.getElementById(elem_name).value;
		if (active_page<pages)
		{
				document.getElementById(elem_name).value=parseInt(active_page)+1;
		}
}

function dec_page (elem_name, pages)
{
		active_page=document.getElementById(elem_name).value;
		if (active_page>1)
		{
				document.getElementById(elem_name).value=parseInt(active_page)-1;
		}
}

function dec(f)
{
    eval("var numb = document.forms." + f + ".num;");
    l = parseInt(numb.value);

    eval("var input = document.forms." + f + ".page;");
    n = input.value;
    
    if(!isNaN(n))
    {
        if(n > 1)
            input.value = parseInt(n) - 1;
    }
    else 
        input.value = "1";
    
}