    //Specify the slider's width (in pixels)
    if (screen.width==800){
        var sliderwidth="380px"
    }
    if (screen.width==1024){
        var sliderwidth="550px"
    }
    if (screen.width==1152){
        var sliderwidth="600px"
    }
    if (screen.width==1280){
        var sliderwidth="870px"
    }
    //Specify the slider's height
    var sliderheight="78px"
    //Specify the slider's slide speed (larger is faster 1-10)
    var slidespeed=2
    //configure background color:
    slidebgcolor="#FFFFFF"

    //Specify the slider's images
    var leftrightslide=new Array()
    var finalslide=''
    //START
    
    leftrightslide[0]='<a href="/fichalibro/?isbn=9500723379" id="[0]"><img src="/images/libros/all/thumb/9500723379.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[1]='<a href="/fichalibro/?isbn=9500723549" id="[1]"><img src="/images/libros/all/thumb/9500723549.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[2]='<a href="/fichalibro/?isbn=9500723557" id="[2]"><img src="/images/libros/all/thumb/9500723557.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[3]='<a href="/fichalibro/?isbn=9500723565" id="[3]"><img src="/images/libros/all/thumb/9500723565.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[4]='<a href="/fichalibro/?isbn=9500723573" id="[4]"><img src="/images/libros/all/thumb/9500723573.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[5]='<a href="/fichalibro/?isbn=9500727757" id="[5]"><img src="/images/libros/all/thumb/9500727757.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[6]='<a href="/fichalibro/?isbn=9789974683068" id="[6]"><img src="/images/libros/all/thumb/9789974683068.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[7]='<a href="/fichalibro/?isbn=9789500729758" id="[7]"><img src="/images/libros/all/thumb/9789500729758.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[8]='<a href="/fichalibro/?isbn=9789506441630" id="[8]"><img src="/images/libros/all/thumb/9789506441630.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[9]='<a href="/fichalibro/?isbn=9789506441609" id="[9]"><img src="/images/libros/all/thumb/9789506441609.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[10]='<a href="/fichalibro/?isbn=9789974683075" id="[10]"><img src="/images/libros/all/thumb/9789974683075.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[11]='<a href="/fichalibro/?isbn=9789974683082" id="[11]"><img src="/images/libros/all/thumb/9789974683082.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[12]='<a href="/fichalibro/?isbn=9789500730969" id="[12]"><img src="/images/libros/all/thumb/9789500730969.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[13]='<a href="/fichalibro/?isbn=9789974683174" id="[13]"><img src="/images/libros/all/thumb/9789974683174.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[14]='<a href="/fichalibro/?isbn=9789871117758" id="[14]"><img src="/images/libros/all/thumb/9789871117758.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[15]='<a href="/fichalibro/?isbn=8481095346" id="[15]"><img src="/images/libros/all/thumb/8481095346.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[16]='<a href="/fichalibro/?isbn=9788481095357" id="[16]"><img src="/images/libros/all/thumb/9788481095357.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[17]='<a href="/fichalibro/?isbn=9788481095364" id="[17]"><img src="/images/libros/all/thumb/9788481095364.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[18]='<a href="/fichalibro/?isbn=9789974683136" id="[18]"><img src="/images/libros/all/thumb/9789974683136.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[19]='<a href="/fichalibro/?isbn=9789974683198" id="[19]"><img src="/images/libros/all/thumb/9789974683198.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[20]='<a href="/fichalibro/?isbn=9788425341113" id="[20]"><img src="/images/libros/all/thumb/9788425341113.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[21]='<a href="/fichalibro/?isbn=9788425341465" id="[21]"><img src="/images/libros/all/thumb/9788425341465.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[22]='<a href="/fichalibro/?isbn=9788425341939" id="[22]"><img src="/images/libros/all/thumb/9788425341939.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[23]='<a href="/fichalibro/?isbn=9788425342714" id="[23]"><img src="/images/libros/all/thumb/9788425342714.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[24]='<a href="/fichalibro/?isbn=9788425341816" id="[24]"><img src="/images/libros/all/thumb/9788425341816.jpg" border="0" width="53" height="78"></a>'
    leftrightslide[25]='<a href="/fichalibro/?isbn=9788425343315" id="[25]"><img src="/images/libros/all/thumb/9788425343315.jpg" border="0" width="53" height="78"></a>'

    //END

    var copyspeed=slidespeed
    leftrightslide='<nobr>'+leftrightslide.join(" ")+'</nobr>'
    var iedom=document.all||document.getElementById
    if (iedom)
    document.write('<span id="temp" style="visibility:hidden;position:absolute;top:-100px;left:-9000px">'+leftrightslide+'</span>')
    var actualwidth=''
    var cross_slide, ns_slide

    function fillup(){
    if (iedom){
    cross_slide=document.getElementById? document.getElementById("test2") : document.all.test2
    cross_slide2=document.getElementById? document.getElementById("test3") : document.all.test3
    cross_slide.innerHTML=cross_slide2.innerHTML=leftrightslide
    actualwidth=document.all? cross_slide.offsetWidth : document.getElementById("temp").offsetWidth
    cross_slide2.style.left=actualwidth+20+"px"
    }
    else if (document.layers){
    ns_slide=document.ns_slidemenu.document.ns_slidemenu2
    ns_slide2=document.ns_slidemenu.document.ns_slidemenu3
    ns_slide.document.write(leftrightslide)
    ns_slide.document.close()
    actualwidth=ns_slide.document.width
    ns_slide2.left=actualwidth+20
    ns_slide2.document.write(leftrightslide)
    ns_slide2.document.close()
    }
    lefttime=setInterval("slideleft()",30)
    }
    window.onload=fillup
    
    function slideleft(){
    if (iedom){
    if (parseInt(cross_slide.style.left)>(actualwidth*(-1)+8))
    cross_slide.style.left=parseInt(cross_slide.style.left)-copyspeed+"px"
    else
    cross_slide.style.left=parseInt(cross_slide2.style.left)+actualwidth+30+"px"
    
    if (parseInt(cross_slide2.style.left)>(actualwidth*(-1)+8))
    cross_slide2.style.left=parseInt(cross_slide2.style.left)-copyspeed+"px"
    else
    cross_slide2.style.left=parseInt(cross_slide.style.left)+actualwidth+30+"px"
    
    }
    else if (document.layers){
    if (ns_slide.left>(actualwidth*(-1)+8))
    ns_slide.left-=copyspeed
    else
    ns_slide.left=ns_slide2.left+actualwidth+30
    
    if (ns_slide2.left>(actualwidth*(-1)+8))
    ns_slide2.left-=copyspeed
    else
    ns_slide2.left=ns_slide.left+actualwidth+30
    }
    }

    if (iedom||document.layers){
    with (document){
    document.write('<table border="0"  cellpadding="5" cellspacing="0" align="center" cellspacing="0"><td>')
    if (iedom){
    write('<div style="position:relative;width:'+sliderwidth+';height:'+sliderheight+';overflow:hidden">')
    write('<div style="position:absolute;width:'+sliderwidth+';height:'+sliderheight+';background-color:'+slidebgcolor+'" onMouseover="copyspeed=0" onMouseout="copyspeed=slidespeed">')
    write('<div id="test2" style="position:absolute;left:0px;top:0px"></div>')
    write('<div id="test3" style="position:absolute;left:-1000px;top:0px"></div>')
    write('</div></div>')
    }
    else if (document.layers){
    write('<ilayer width='+sliderwidth+' height='+sliderheight+' name="ns_slidemenu" bgColor='+slidebgcolor+'>')
    write('<layer name="ns_slidemenu2" left=0 top=0 onMouseover="copyspeed=0" onMouseout="copyspeed=slidespeed"></layer>')
    write('<layer name="ns_slidemenu3" left=0 top=0 onMouseover="copyspeed=0" onMouseout="copyspeed=slidespeed"></layer>')
    write('</ilayer>')
    }
    document.write('</td></table>')
    }
    }
