How to change <g> tag transform value while mousemove in svg?

I am working with SVG-EDITOR Demo https://code.google.com/p/svg-edit/ <g> tags using JavaScript.I need to change <g> tag Transform values whilemouse-move event.
 Here we assign temporary div is #demo_test and then we will assigned into svg_source_textareatextarea.First time dragged SVG object working fine and transformation will be placed properly. 

 We i dragged svg object into svg working area with tag, Object transform will placed. When i move that object into some other place, Transformation translate will not recalculated properly. First time getting transform translate(98, 98) scale(0.5, 0.51) it remain same while mouse-move event that object.How to recalculated into object transformation.Here,after mouse-move,translate(184, 1) translate(98, 98) scale(0.5, 0.51). How to change <g>
tag transform value while mouse move in svg using javascript?