JAVAScript失去控件的坐标

JAVAScript得到控件的坐标

function getAbsoluteHeight(ob){         return ob.offsetHeight}function getAbsoluteWidth(ob){     return ob.offsetWidth}     function getAbsoluteLeft(ob){         var mendingLeft = ob .offsetLeft;         while( ob != null && ob.offsetParent != null && ob.offsetParent.tagName != "BODY" ){             mendingLeft += ob .offsetParent.offsetLeft;             ob = ob.offsetParent;         }         return mendingLeft ;     }     function getAbsoluteTop(ob){         var mendingTop = ob.offsetTop;         while( ob != null && ob.offsetParent != null && ob.offsetParent.tagName != "BODY" ){             mendingTop += ob .offsetParent.offsetTop;             ob = ob .offsetParent;         }         return mendingTop ;     }

?