<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script type="text/javascript" src="/jquery-1.11.0.min.js"></script> <style> body{ position: relative; margin:0; padding:0; width:100%; height: 1000px; } #box{ height: 500px; width:100%; background: #CDCDCD; } #small-box{ height: 500px; width:500px; position: absolute; left:0; top:0; background: #FF66CC; cursor:move ; opacity: 0.7; } </style> </head> <body> <div id="box"> <div id="small-box"></div> </div> <script> var box=$("#small-box"); var body=$('body'); var index=0; var x1; box.mousedown(function(){ index=1; //鼠标按下才能触发onmousemove方法 var x=event.clientX; //鼠标点击的坐标值，x var left= this.style.left; left=left.substr(0,left.length-2); //去掉px x1=parseInt(x-left); }); box.mousemove(function(){ if(index===1){ this.style.left=event.clientX-x1+'px'; if(this.style.left.substr(0,this.style.left.length-2)<0){ this.style.left=0; }; if(this.style.left.substr(0,this.style.left.length-2)>500){ this.style.left='500px'; };//最大滑动距离 } }); box.mouseup(function(){ index=0; }); body.mouseup(function(){ index=0; }); </script> </body> </html>