// *** Java Script to set cookies to remember style sheet changes***

var style_cookie_name = "style" ;
var style_cookie_duration = 30 ;
var size_cookie_name = "small" ;
var size_cookie_duration = 30 ;


function switch_style ( css_title )
{
  var i, link_tag ;
  for (i = 0, link_tag = document.getElementsByTagName("link") ;
    i < link_tag.length ; i++ ) {
    if ((link_tag[i].rel.indexOf( "stylesheet" ) != -1) &&
      link_tag[i].title) {
      link_tag[i].disabled = true ;
      if (link_tag[i].title == css_title) {
        link_tag[i].disabled = false ;
      }
    }
//    set_style(css_title);
    set_cookie( style_cookie_name, css_title,
      style_cookie_duration );
  }
}
function set_style_from_cookie()
{
  var css_title = get_cookie( style_cookie_name );
 // alert('style= '+css_title);
  if (css_title.length) {
	//  alert("test2");
    switch_style( css_title );
  }
}
function set_style (css_title) {
//    var font_size = get_cookie( size_cookie_name);
    var style = get_cookie( style_cookie_name );


    if (css_title=='wasu_style'){
            if (style=='black_large_stylesheet' || style=='large_fonts') {
    //                css_title ='large_fonts';
                    switch_style( 'large_fonts' );    
            } else {
                    switch_style( css_title );
            }
    } else if (css_title=='black_stylesheet'){
            if (style=='large_fonts') {
                    css_title ='black_large_stylesheet';
                    switch_style( css_title );    
            } else {
                    switch_style( css_title );
            }
    }
}
function set_size (font_size ) {
	//alert(font_size);
//    set_cookie( size_cookie_name, font_size,
   //   size_cookie_duration );
    var css_title = get_cookie( style_cookie_name );
    if (font_size =='large') {
        if (css_title =='black_stylesheet') {
            css_title = 'black_large_stylesheet';
            switch_style( css_title );
        } else {
            css_title = 'large_fonts';
            switch_style( css_title );
        }
    }
    if (font_size =='small') {
        if (css_title =='large_fonts') {
            css_title = 'wasu_style';
            switch_style( css_title );
        }
        if (css_title =='black_large_stylesheet') {
            css_title = 'black_stylesheet';
            switch_style( css_title );
        }
    }
}
function set_cookie ( cookie_name, cookie_value,
    lifespan_in_days, valid_domain )
{
    var domain_string = valid_domain ?
                       ("; domain=" + valid_domain) : '' ;
    document.cookie = cookie_name +
                       "=" + encodeURIComponent( cookie_value ) +
                       "; max-age=" + 60 * 60 *
                       24 * lifespan_in_days +
                       "; path=/" + domain_string ;
}
function get_cookie ( cookie_name )
{

    var cookie_string = document.cookie ;
    if (cookie_string.length != 0) {
        var cookie_value = cookie_string.match (
                        '(^|;)[\s]*' +
                        cookie_name +
                        '=([^;]*)' );
        return decodeURIComponent ( cookie_value[2] ) ;
    }
    return '' ;
}

// JavaScript Document