var snapImgNdx=0;
var snapImgLast=0;
function goFirstImage(){
snapImgNdx=0;
document["tpSnapShotFile"].src=scriptAr[0];
setScrollButtons();
}
function goPrevImage(){
if(snapImgNdx>0){
snapImgNdx--;
}
document["tpSnapShotFile"].src=scriptAr[snapImgNdx];
setScrollButtons();
}
function goNextImage(){
if(snapImgNdx<snapImgLast){
snapImgNdx++;
}
document["tpSnapShotFile"].src=scriptAr[snapImgNdx];
setScrollButtons();
}
function goLastImage(){
snapImgNdx=snapImgLast;
document["tpSnapShotFile"].src=scriptAr[snapImgLast];
setScrollButtons();
}
function setScrollButtons(){
if(snapImgNdx>0){
document.getElementById("goFirst").innerHTML="<a href=\"javascript:goFirstImage()\" title=\"First image of this day\">&lt;&lt;</a>";
document.getElementById("goPrev").innerHTML="<a href=\"javascript:goPrevImage()\" title=\"Previous image on this day\">&lt;</a>";
}else{
document.getElementById("goFirst").innerHTML="";
document.getElementById("goPrev").innerHTML="";
}
if(snapImgNdx<snapImgLast){
document.getElementById("goNext").innerHTML="<a href=\"javascript:goNextImage()\" title=\"Next image on this day\">&gt;</a>";
document.getElementById("goLast").innerHTML="<a href=\"javascript:goLastImage()\" title=\"Last image of this day\">&gt;&gt;</a>";
}else{
document.getElementById("goNext").innerHTML="";
document.getElementById("goLast").innerHTML="";
}
}