//image x,y offsets from cursor position in pixels. Enter 0,0 for no offsetvar displayduration=0; //duration in seconds image should remain visible. 0 for always.
var defaultimageheight = 10;    // maximum image size.
var defaultimagewidth = 10;    // maximum image size.
var timer;
function gettrailobj(){
if (document.getElementById)
return document.getElementById("preview_div").style
}
function gettrailobjnostyle(){
if (document.getElementById)
return document.getElementById ("preview_div")
}
function truebody(){
return (!window.opera && document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}
function hidetrail(){
    gettrailobj().display= "none";
    document.onmousemove=""
    gettrailobj().left="-500px"
    clearTimeout(timer);
}
function showtrail(imagename,width,height){
    //if(width==2){ window.offsetfrommouse=[13,-30]; } else { window.offsetfrommouse=[13,-200]; }
    window.offsetfrommouse=[13,-200];
    i = imagename
    w = width
    h = height
    timer = setTimeout("show('"+i+"',w,h);",200);
    document.followmouse;
}
function show(imagename,width,height){
    var docwidth= document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth - window.offsetfrommouse[0]
    var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight )
    if( (navigator.userAgent.indexOf("Konqueror")==-1  || navigator.userAgent.indexOf("Firefox")!=-1 || (navigator.userAgent.indexOf("Opera")==-1 && navigator.appVersion.indexOf("MSIE")!=-1)) && (docwidth>650 && docheight>500)) {
        ( width == 0 ) ? width = defaultimagewidth: '';
        ( height == 0 ) ? height = defaultimageheight: '';
        width+=1
        height+=1
        defaultimageheight = height
        defaultimagewidth = width

        document.onmousemove=followmouse;
    if(width!=2){
        newHTML = '<table width="50" border="0" cellpadding="5" cellspacing="0" bgcolor="#FFFFFF"><tr><td class="leg" nowrap="nowrap">';
        newHTML = newHTML + '<img src="__img/fachada/'+imagename+'">';
        newHTML = newHTML + '</td></tr></table>';
     } else {
        newHTML = '<table width="50" border="0" cellpadding="5" cellspacing="0" bgcolor="#FFFFFF"><tr><td class="leg" nowrap="nowrap">';
        newHTML = newHTML + '<img src="__img/fachada/'+imagename+'">';
        newHTML = newHTML + '</td></tr></table>';
     }
        gettrailobjnostyle().innerHTML = newHTML;
        gettrailobj().display="block";
        document.followmouse;
    }
}
function followmouse(e){
    var xcoord=window.offsetfrommouse[0]
    var ycoord=window.offsetfrommouse[1]
    var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15
    var docheight=document.all ? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight)

    if (typeof e != "undefined"){
        if (docwidth - e.pageX < defaultimagewidth + 2*window.offsetfrommouse[0]){
            xcoord = e.pageX - xcoord - defaultimagewidth; // Move to the left side of the cursor
        } else {
            xcoord += e.pageX;
        }
        if (docheight - e.pageY < defaultimageheight + 2*window.offsetfrommouse[1]){
            ycoord += e.pageY - Math.max(0,(2*window.offsetfrommouse[1] + defaultimageheight + e.pageY - docheight - truebody().scrollTop));
        } else {
            ycoord += e.pageY;
        }
    } else if (typeof window.event != "undefined"){
        if (docwidth - event.clientX < defaultimagewidth + 2*window.offsetfrommouse[0]){
            xcoord = event.clientX + truebody().scrollLeft - xcoord - defaultimagewidth; // Move to the left side of the cursor
        } else {
            xcoord += truebody().scrollLeft+event.clientX
        }
        if (docheight - event.clientY < (defaultimageheight + 2*window.offsetfrommouse[1])){
            ycoord += event.clientY + truebody().scrollTop - Math.max(0,(2*window.offsetfrommouse[1] + defaultimageheight + event.clientY - docheight));
        } else {
            ycoord += truebody().scrollTop + event.clientY;
        }
    }
    gettrailobj().left=xcoord+"px"
    gettrailobj().top=ycoord+"px"

}