function OnChkAll(obj,dgstr,checkstr,num)
{
	var i;
	i=num;
	//var objID = dgstr+i+checkstr;
	while(document.getElementById(dgstr+i+checkstr))
	{
		chkBox = document.getElementById(dgstr+i+checkstr);
		chkBox.checked=obj.checked;
		i=i+1;
		//objID = dgstr+i+str;
	}		
}