jQuery实现Div拖动+键盘控制综合效果的方法

本文实例讲述了jQuery实现Div拖动+键盘控制综合效果的方法。分享给大家供大家参考。具体实现方法如下：

代码如下:

<!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>
<title>jQuery Div拖动+键盘控制综合效果</title>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<script src="/ajaxjs/jquery1.3.2.js"></script>
</head>
<body>
预览时看不到效果，刷新一下即可
<div id="text" style="width:120px;height:60px;background:#F06;position:absolute;left:500px;top:90px;cursor:move;"></div>
<script type="text/javascript">
var msgObj = document.getElementById('text');
var posx = 0;
var posy = 0;
var moveable = false;
var MouseDownEvent = document.onmousedown;
var MouseMoveEvent = document.onmousemove;
var MouseUpEvent = document.onmouseup;
msgObj.onmousedown = function(evt) {
    var evt = evt||window.event;
    moveable = true;
    posy = evt.clientY-parseInt(msgObj.style.top);
    posx = evt.clientX-parseInt(msgObj.style.left);
    document.onmousemove = function(evt) {
        if (moveable) {
            var evt = evt||window.event;
            msgObj.style.left = evt.clientX - posx + "px";
            msgObj.style.top = evt.clientY - posy + "px";
        }
        change();
    };
    document.onmouseup = function () {
        if (moveable) {
            document.onmousemove = MouseMoveEvent;
            document.onmouseup = MouseUpEvent;
            moveable = false;
            posx = 0;
            posy = 0;
        }
    };
}
var v=1;
var a=0.9;
var h=document.documentElement.clientHeight;
function scroll(){
    var timer=setInterval(function(){
        v +=a;
        var top=(parseInt(msgObj.style.top)||0);
        if(top+v>h-70){
            if(v<2)clearInterval(timer);
            msgObj.style.top=h-70+"px";
            v=-v*0.5;  
        }else{
            msgObj.style.top=top+v+"px";
        }
        change();
    },10);
};
$(document).keyup(function(e){
    var e = e || window.event ;
    if(e.which == 13){
        scroll();  
    }
})
var x = 4 ;
var y = 4 ;
function newpro(){
    var Height = document.documentElement.clientHeight ;
    var Width = document.documentElement.clientWidth ;
    var newobj = document.createElement('div');
    newobj.setAttribute('id','bigbox');
    newobj.style.position = 'absolute';
    newobj.style.left = 20 +"px";
    newobj.style.top = 80 +"px";
    newobj.style.height = Height/x +"px" ;
    newobj.style.width = Width/y +"px" ;
    newobj.style.borderWidth = 1+"px";
    newobj.style.borderColor = "#ff6500";
    newobj.style.borderStyle = 'solid' ;
    newobj.innerHTML='<div id="minbox"></div>';
    document.body.appendChild(newobj);
    change();
}
function change(){
    var minobj = document.getElementById('minbox');
    minobj.style.position = 'absolute';
    minobj.style.left = parseInt(msgObj.style.left)/x +"px";
    minobj.style.top = parseInt(msgObj.style.top)/y +"px";
    minobj.style.height = 20 +"px" ;
    minobj.style.width = 30 +"px" ;
    minobj.style.background = "#F06";
}
window.onload = function(){
    newpro();
}
</script>
</body>
</html>

希望本文所述对大家的jQuery程序设计有所帮助。