JS擷取滑鼠位置

var mousePos;<br />function mousePosition(ev){<br />if(ev.pageX || ev.pageY){<br />return {x:ev.pageX, y:ev.pageY};<br />}<br />return {x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,<br /> y:ev.clientY + document.body.scrollTop - document.body.clientTop};<br />}<br />//顯示出一個層，divId:層id；x:右位移像素；y:下位移像素；<br />function openDiv(divId,x,y){<br />if(x==null){x=0;}<br />if(y==null){y=0;}<br />if(document.getElementById(divId)!=null){<br />var dvs=document.getElementById(divId).style;<br />dvs.left=mousePos.x+x+"px";<br />dvs.top=mousePos.y+y+"px";<br />dvs.display="";}<br />}<br />function mouseMove(ev){<br /> ev = ev || window.event;<br /> mousePos = mousePosition(ev);<br />}<br />window.document.onmousemove = mouseMove;