Repositioning images in a gallery based on the current image I'm working on extending the functionality of a photo gallery by adding a thumbnail display, I have multiple if statements set up to adjust the position of the thumbnails. Obviously this is not ideal, I'm trying to put my head around how to use a for loop to iterate the width multiplier and curSlide position.

Ideally I would like the curSlide to increment after every 5 slide and the thumbGalwidth*i to increment as well.

var thumbGalwidth = 795;

if(currSlide &lt; 6) {
jQuery('#view-all-container').css('margin-left', '-' + thumbGalwidth*0 + 'px');
}
if(currSlide &gt;= 6) {
jQuery('#view-all-container').css('margin-left', '-' + thumbGalwidth*1 + 'px');
}
if (currSlide &gt;= 11) {
jQuery('#view-all-container').css('margin-left', '-' + thumbGalwidth*2 + 'px');
}
if (currSlide &gt;= 16) {
jQuery('#view-all-container').css('margin-left', '-' + thumbGalwidth*3 +     'px');
}
if (currSlide &gt;= 21) {
jQuery('#view-all-container').css('margin-left', '-' + thumbGalwidth*4 +    'px');
}
if (currSlide &gt;= 26) {
jQuery('#view-all-container').css('margin-left', '-' + thumbGalwidth*5 +    'px');
}
Because you have nice, predictable ranges, you don't need a loop at all. Just do a little math.

var thumbGalwidth = 795;

var n = Math.floor(((currSlide || 1)-1) / 5);

jQuery('#view-all-container').css('margin-left', '-' + thumbGalwidth*n + 'px');




If the largest n should be 5, then change the assignment to this:

var n = Math.min(5, Math.floor(((currSlide || 1)-1) / 5));