javascript中模拟鼠标点击事件

function Button1_onclick() {

alert("button1");
alert(event.clientX);


}

function Button2_onclick() {
 doClick("Button1",event);
 
 
}

function doClick(linkId, e){  
         
                var fireOnThis = document.getElementById(linkId)
                  if (document.createEvent)
                  {
                    var evObj = document.createEvent('MouseEvents')
                    evObj.initEvent( 'click', true, false )
                    fireOnThis.dispatchEvent(evObj)
                  }
                  else if (document.createEventObject)
                  {
                       fireOnThis.fireEvent('onclick')
                  }
}