function mark_row(row_id,stat){
if (stat)
		$("#"+row_id).addClass("row_selected");
else
		$("#"+row_id).removeClass("row_selected");
}


function toggleBtn(str_field,btnid){
btn = document.getElementById(btnid);
if (str_field=="")
	btn.disabled=true;
else
	btn.disabled=false;
}


	
function check_all(obj,checkbox_name){

	/*
		description = global checkbox which mark all the other checkbox in the table.
		obj = the main checbox.
		checkbox_name = the name of all checkboxes.
	*/
	if (obj.checked == true)
		mark_as = true;
	else
		mark_as = false;
	var records = document.getElementsByName(checkbox_name);
	for (i=0;i<records.length;i++){
		rec = records[i];
		rec.checked = mark_as;
	}
}