function contextMenu(props,events){
this.props = props;
this.events = events;
}
contextMenu.prototype.buildContextMenu = function(){
var menuObj = document.getElementById(this.props.menuID);
var targetEle = this.props.targetEle;
var eventFunc = this.events;
var _bodyWidth = document.body.offsetWidth ||document.body.clientWidth;
var _bodyHeight = document.body.offsetHeight || document.body.clientHeight;
var _mWidth = menuObj.style.width;
var _mHeight = menuObj.offsetHeight;