function gen_specs(id,spec_string){
   var html='<table cellpadding="0" cellspacing="0" class="spectable">';
   var rows=spec_string.split(",");
   for(var i=0;i<rows.length;i++){
      var sv=rows[i].split(':');
      if( sv[0].replace(" ","")==""){ continue; }
      var cl="even";
      if(i%2){ cl="odd"; } 
      html+='<tr class="'+cl+'"><td class="specname">'+sv[0]+
            '</td><td class="specvalue">'+sv[1]+"</td></tr>";
   }
   var s=document.getElementById(id);
   s.innerHTML=html;
}