可以拖拽的div
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <style> #div1 {100px; height:100px; background:red; position:absolute;} </style> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>可以拖拽的div</title> <script> window.onload=function () { var oDiv=document.getElementById('div1'); var disX=0; var disY=0; oDiv.onmousedown=function (ev) { var oEvent=ev||event; disX=oEvent.clientX-oDiv.offsetLeft; disY=oEvent.clientY-oDiv.offsetTop; document.onmousemove=function (ev) { var oEvent=ev||event; var l=oEvent.clientX-disX; var t=oEvent.clientY-disY; if(l<0) { l=0; } else if(l>document.documentElement.clientWidth-oDiv.offsetWidth) { l=document.documentElement.clientWidth-oDiv.offsetWidth; } if(t<0) { t=0; } else if(t>document.documentElement.clientHeight-oDiv.offsetHeight) { t=document.documentElement.clientHeight-oDiv.offsetHeight; } oDiv.style.left=l+'px'; oDiv.style.top=t+'px'; }; document.onmouseup=function () { document.onmousemove=null; document.onmouseup=null; }; return false; }; }; </script> </head> <body> <div id="div1"></div> </body> </html>