[正则表达式]前台JS得到控件ID (该控件被其它控件包住了)

GridView包GridView包TextBox, 得到TextBox的客户端ID的自动生成的部分:
^.*?\d+_[^_]+_[^_]+_[^_]+_+[a-z]+\d+_
匹配 GridSegment_ctl02_PP_ProcessTask_GridTask_ctl02_XXXXXXXX

Repeater包GridView包TextBox:
^.*?\d+_[^_]+_+[a-z]+\d+_
匹配 RepeaterPriceMaintain_ctl08_QDataGridPriceDetailMaintain_ctl02_XXXXXXXXXX

JS中的用法：

function GetValueFromQLookUp(obj, control, value)
            {      
                var matchInfo = /^.*?\d+_[^_]+_+[a-z]+\d+_/;
                var matchObjID =  obj.match(matchInfo);      
                var halfClientID = matchObjID[0]  
                var newID = halfClientID + control           
                document.getElementById(newID).value = value;   
            }