js获取触发事件元素的坐标

function Point(iX, iY){
this.x = iX;
this.y = iY;
}

function fGetXY(aTag){
var oTmp=aTag;
var pt = new Point(0,0);
do {
pt.x += oTmp.offsetLeft;
pt.y += oTmp.offsetTop;
oTmp = oTmp.offsetParent;
} while(oTmp.tagName!="BODY");

return pt;
}

如果想在触发事件的元素(例如文本框假如是myinput)下面弹出一个div

获取触发事件的元素

var myinput = window.event.srcElement;

设置弹出元素的位置

div.left = point.x;
div.top = point.y+myinput.offsetHeight+1;
div.style.visibility = 'visible';