// this function is needed to work around 
  // a bug in IE related to element attributes
function hasClass(obj) {
     var result = false;
     if (obj.getAttributeNode("class") != null) {
         result = obj.getAttributeNode("class").value;
     }
     return result;
}   

function stripe(id) {

    // the flag we'll use to keep track of 
    // whether the current row is odd or even
    var even = false;
  
    // if arguments are provided to specify the colours
    // of the even & odd rows, then use the them;
    // otherwise use the following defaults:
    var evenColor = arguments[1] ? arguments[1] : "#eee";
    var oddColor = arguments[2] ? arguments[2] : "#fff";
  
    // obtain a reference to the desired table
    // if no such table exists, abort
    var table = document.getElementById(id);
    if (! table) { return; }
    
    // by definition, tables can have more than one tbody
    // element, so we'll have to get the list of child
    // <tbody>s 
    var tbodies = table.getElementsByTagName("tbody");

    // and iterate through them...
    for (var h = 0; h < tbodies.length; h++) {
    
     // find all the &lt;tr&gt; elements... 
      var trs = tbodies[h].getElementsByTagName("tr");
      
      // ... and iterate through them
      for (var i = 0; i < trs.length; i++) {

        // avoid rows that have a class attribute
        // or backgroundColor style
        if (! hasClass(trs[i]) &&
            ! trs[i].style.backgroundColor) {
 		  
          // get all the cells in this row...
          var tds = trs[i].getElementsByTagName("td");
        
          // and iterate through them...
          for (var j = 0; j < tds.length; j++) {
        
            var mytd = tds[j];

            // avoid cells that have a class attribute
            // or backgroundColor style
            if (! hasClass(mytd) &&
                ! mytd.style.backgroundColor) {
        
              mytd.style.backgroundColor =
                even ? evenColor : oddColor;
            
            }
          }
        }
        // flip from odd to even, or vice-versa
        even =  ! even;
      }
    }
}

function blockit(nr,show,rek)
{
	current  = ( show != 0 ) ? 'block' : 'none';
	selected = ( show != 0 ) ? 'selected' : 'none';
	if (document.getElementById)
	{
		document.getElementById(nr).style.display = current;
		document.getElementById(nr + '_link').className = selected;
	}
	else if (document.layers)
	{
		document.layers[nr].display = current;
		document.layers[nr + '_link'].className = selected;
	}
	else if (document.all)
	{
		document.all[nr].style.display = current;
		document.all[nr + '_link'].className = slected;
	}

	if(rek != 0) {
		switch (nr) {
			case 'egenskaper':
				blockit('fordelar',0,0);
				blockit('teknisk_data',0,0);
				break;
			case 'fordelar':
				blockit('egenskaper',0,0);
				blockit('teknisk_data',0,0);
				break;
			case 'teknisk_data':
				blockit('egenskaper',0,0);
				blockit('fordelar',0,0);
				break;
			default:
				blockit('fordelar',0,0);
				blockit('teknisk_data',0,0);
				break;
				
		}
	}
	return 1;
}


function set_cookie ( name, value, days )
{
  var cookie_string = name + "=" + escape ( value );
  if ( !days ) { days = 10; }
  
  var expires = new Date (  );
  expires.setDate ( expires.getDate() + days );
  cookie_string += "; expires=" + expires.toGMTString();

  document.cookie = cookie_string;
}
function get_cookie ( cookie_name )
{
  var results = document.cookie.match ( '(^|;) ?' + cookie_name + '=([^;]*)(;|$)' );

  if ( results )
    return ( unescape ( results[2] ) );
  else
    return null;
}


function check(id) {
	document.getElementById('id-'+id).checked=true;
}

function idfix( id ) {
	return id.substr(3);
}

var comp_arr = Array();
var jump = 0;
function compare( jump ) {
	if (get_cookie('url')) { comp_arr = get_cookie('url').split(','); }
	var x   = document.getElementsByTagName("input");
	for (var i=0; i<x.length; i++) { 
		if( x[i].checked ) {
			comp_arr.push( idfix( x[i].id ) );
		}
  	}
	set_cookie( 'url', comp_arr, 30 );
	if(jump == 1) { window.location = 'compare.php?id=' + comp_arr.join(','); }
}

function remove_from_compare( id ) {
	if (get_cookie('url')) { comp_arr = get_cookie('url').split(','); }
	
	var temp = Array();
	for (var i=0;i<comp_arr.length;i++) {
		if (id != comp_arr[i]) {
			temp.push( comp_arr[i] );
		}
	}
	comp_arr = temp;
	set_cookie( 'url', comp_arr, 30 );
	window.location = 'compare.php?id=' + comp_arr.join(',');
}
function remove_all_from_compare(  ) {
	comp_arr = Array();
	set_cookie( 'url', comp_arr, 30 );
	window.location = 'compare.php?id=' + comp_arr.join(',');
}