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示例一: x方向没有滚动
var mx=0,my=0; 
	function  mouseMove(ev){Ev=ev||window.event;var mousePos=mouseCoords(Ev);mx=mousePos.x;my=mousePos.y;} 
	function mouseCoords(ev){ 
		  if(ev.pageX||ev.pageY){
			    return{x:ev.pageX,y:ev.pageY};
		  } 
		  return{x:ev.clientX,y:ev.clientY+$(document).scrollTop()}; 
	}   
function mousePosition(ev){//返回一个类
    if(ev.pageX || ev.pageY){
        return {x:ev.pageX, y:ev.pageY};
    }
    return {
        x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,
        y:ev.clientY + document.body.scrollTop - document.body.clientTop
    }
}
function mouseMove(ev){
    ev = ev || window.event;
    var mousePos = mousePosition(ev);//mousePos现在为一个类
    document.getElementById(‘txt‘).value=mousePos.x+":"+mousePos.y
} 
document.onmousemove = mouseMove
e.pageX;event.clientX,event.clientY,scrollLeft,clientLeft获取鼠标位置
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原文地址:http://www.cnblogs.com/mawenying/p/5541374.html