dynamics crm - Retrieve rows in crm2011 subgrid with JScript -

as jscript newbie, have problem subgrid in ms crm 2011.

i have form subgrid , in onsave of form, want loop on rows in subgrid.

how can jscript ? or possible way, ex plugin ?

thx

here sample code can on save of form

var gridcontrol = document.getelementbyid('grdrelatedcontacts').control; (var intrownumber = 0; intrownumber < gridcontrol.getrecordsfrominnergrid().length; intrownumber++)     (var intcellnumber = 0; intcellnumber < gridcontrol.getrecordsfrominnergrid()[intrownumber][3].cells.length; intcellnumber++)         alert(gridcontrol.getrecordsfrominnergrid()[intrownumber][3].cells[intcellnumber].outertext);