JS拖拽的进一步练习，移动与拉伸实现代码

直接在本地是支持IE6的，有个问题就是，鼠标点击的时候光标会变为选择文字的光标，不知道应该怎么处理这个问题呢？
在此记录一下代码：

简单拖拽扩展

*{margin:0;padding:0;}
#outwarp{ margin:20px auto; width:600px; height:600px; background:#fff; border:1px solid #333; position: relative; }
.controlBox{ width:200px; height:200px; position: absolute; left:25px; top:50px; background:#ccc; font-size:12px; color:#fff; border: 1px solid #333;}
.controlBar{cursor: move;}
.controlBar h2{ font-size:12px; text-align: center; line-height: 25px; background: blue;}
.innerCon{text-align: left; line-height: 20px;}
.innerCon p{ padding: 10px; color: #000;}
.resize{ position: absolute; height: 10px; width:10px; color: white; z-index: 10; background: red;}
.lt{left:0;right:0; cursor:nw-resize;}
.tr{right:0;top: 0;cursor:ne-resize;}
.rb{right:0;bottom: 0; cursor:nw-resize;}
.bl{left:0;bottom:0;cursor:ne-resize;}

按此处拖动

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(function () {
//定义便捷函数getElementById,getElementsByTagName,getElementsByClassName,bindFunction,bindEvent
function $() {
var elements = new Array();
for (var i = 0; i (this.warpWidth - this.controlBoxWidth) && (left = this.warpWidth - this.controlBoxWidth);
top > (this.warpHeight - this.controlBoxHeight) && (top = this.warpHeight - this.controlBoxHeight);
//改变位置
myStyle.left = left + 'px';
myStyle.top = top + 'px';
//右下角拖动
} else if (this.draging == this.resizeRb) {
// 需要改变的宽度
var changeWidth = posx - this.controlBoxWidth - this.controlBoxLeft,
changeHeight = posy - this.controlBoxHeight - this.controlBoxTop,
// 计算总宽度
allWidth = this.controlBoxWidth + changeWidth + this.controlBoxLeft ,
allHeight = this.controlBoxHeight + changeHeight + this.controlBoxTop;
//改变宽度
myStyle.width = (this.controlBoxWidth + changeWidth) + 'px';
myStyle.height = (this.controlBoxHeight + changeHeight) + 'px';
// 限制最大宽度
if (allWidth > this.warpWidth) {
myStyle.width = ( this.warpWidth - this.controlBoxLeft) + 'px';
}
if (allHeight > this.warpHeight) {
myStyle.height = (this.warpHeight - this.controlBoxTop) + 'px';
}
// 限制最小宽度
if ( parseInt(myStyle.width) this.warpWidth) myStyle.width = ( this.warpWidth - this.controlBoxLeft) + 'px';
if ( parseInt(myStyle.width) this.lb_y){
my.style.height = this.lb_y + 'px';
my.style.top = 0;
}
// 左上角
}else if (this.draging == this.resizeLt) {
changeWidth = this.controlBoxLeft - posx;
changeHeight = this.controlBoxTop - posy;
my.style.left = posx + 'px';
my.style.width = (this.controlBoxWidth + changeWidth) + 'px';
my.style.top = posy + 'px';
my.style.height = (this.controlBoxHeight + changeHeight) + 'px';
// 限制宽高度最大值
if(parseInt(my.style.width) > this.controlBoxLeft + this.controlBoxWidth){
my.style.width = (this.controlBoxLeft + this.controlBoxWidth) + 'px';
my.style.left = 0;
}else if(parseInt(my.style.width) this.controlBoxHeight + this.controlBoxTop){
my.style.height = (this.controlBoxHeight + this.controlBoxTop) + 'px';
if(parseInt(my.style.top) this.lt_x){
my.style.width = this.lt_x + 'px';
my.style.left = 0;
}
if(parseInt(my.style.height) this.warpHeight- this.lt_y){
my.style.height = this.warpHeight- this.lt_y +'px';
}
}
break;

case 'mouseup':
this.draging = null;
break;
}
},
bind:function () {
var that = this;
bindEvent(document, 'mousedown', bindFunction(that,that.moveBox));
bindEvent(document, 'mousemove', bindFunction(that,that.moveBox));
bindEvent(document, 'mouseup', bindFunction(that,that.moveBox));
}
};
var demo = new DragBox({
outWarpId:'outwarp'
});
})()

[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]