jq冲突大神们！！

<script type="text/javascript" src="js/jquery-1.7.1.min.js"></script>
<script type="text/javascript" src="js/jquery.touchSlider.js"></script>
<script type="text/javascript" src="js/jquery.event.drag-1.5.min.js"></script>
网页第一个特效（同时调用上面3个jq）
<script type="text/javascript">
$(document).ready(function(){
$(".main_visual").hover(function(){
$("#btn_prev,#btn_next").fadeIn()
},function(){
$("#btn_prev,#btn_next").fadeOut()
});
$dragBln = false;
$(".main_image").touchSlider({
flexible : true,
speed : 200,
btn_prev : $("#btn_prev"),
btn_next : $("#btn_next"),
paging : $(".flicking_con a"),
counter : function (e){
$(".flicking_con a").removeClass("on").eq(e.current-1).addClass("on");
}
});
$(".main_image").bind("mousedown", function() {
$dragBln = false;
});
$(".main_image").bind("dragstart", function() {
$dragBln = true;
});
$(".main_image a").click(function(){
if($dragBln) {
return false;
}
});
timer = setInterval(function(){
$("#btn_next").click();
}, 5000);
$(".main_visual").hover(function(){
clearInterval(timer);
},function(){
timer = setInterval(function(){
$("#btn_next").click();
},5000);
});
$(".main_image").bind("touchstart",function(){
clearInterval(timer);
}).bind("touchend", function(){
timer = setInterval(function(){
$("#btn_next").click();
}, 5000);
});
});
</script>
网页第二个特效（只调用上面jquery-1.7.1.min.js）
<script type="text/javascript">
(function($){
function Pointer(x, y) {
this.x = x ;
this.y = y ;
}
function Position(left, top) {
this.left = left ;
this.top = top ;
}
$(".item_content .item").each(function(i) {
this.init = function() { // 初始化
this.box = $(this).parent() ;
$(this).attr("index", i).css({
position : "absolute",
left : this.box.offset().left,
top : this.box.offset().top
}).appendTo(".item_content") ;
this.drag() ;
},
this.move = function(callback) { // 移动
$(this).stop(true).animate({
left : this.box.offset().left,
top : this.box.offset().top
}, 500, function() {
if(callback) {
callback.call(this) ;
}
}) ;
},
this.collisionCheck = function() {
var currentItem = this ;
var direction = null ;
$(this).siblings(".item").each(function() {
if(
currentItem.pointer.x > this.box.offset().left &&
currentItem.pointer.y > this.box.offset().top &&
(currentItem.pointer.x < this.box.offset().left + this.box.width()) &&
(currentItem.pointer.y < this.box.offset().top + this.box.height())
) {
// 返回对象和方向
if(currentItem.box.offset().top < this.box.offset().top) {
direction = "down" ;
} else if(currentItem.box.offset().top > this.box.offset().top) {
direction = "up" ;
} else {
direction = "normal" ;
}
this.swap(currentItem, direction) ;
}
}) ;
},
this.swap = function(currentItem, direction) { // 交换位置
if(this.moveing) return false ;
var directions = {
normal : function() {
var saveBox = this.box ;
this.box = currentItem.box ;
currentItem.box = saveBox ;
this.move() ;
$(this).attr("index", this.box.index()) ;
$(currentItem).attr("index", currentItem.box.index()) ;
},
down : function() {
// 移到上方
var box = this.box ;
var node = this ;
var startIndex = currentItem.box.index() ;
var endIndex = node.box.index(); ;
for(var i = endIndex; i > startIndex ; i--) {
var prevNode = $(".item_content .item[index="+ (i - 1) +"]")[0] ;
node.box = prevNode.box ;
$(node).attr("index", node.box.index()) ;
node.move() ;
node = prevNode ;
}
currentItem.box = box ;
$(currentItem).attr("index", box.index()) ;
},
up : function() {
// 移到上方
var box = this.box ;
var node = this ;
var startIndex = node.box.index() ;
var endIndex = currentItem.box.index(); ;
for(var i = startIndex; i < endIndex; i++) {
var nextNode = $(".item_content .item[index="+ (i + 1) +"]")[0] ;
node.box = nextNode.box ;
$(node).attr("index", node.box.index()) ;
node.move() ;
node = nextNode ;
}
currentItem.box = box ;
$(currentItem).attr("index", box.index()) ;
}
}
directions[direction].call(this) ;
},
this.drag = function() { // 拖拽
var oldPosition = new Position() ;
var oldPointer = new Pointer() ;
var isDrag = false ;
var currentItem = null ;
$(this).mousedown(function(e) {
e.preventDefault() ;
oldPosition.left = $(this).position().left ;
oldPosition.top = $(this).position().top ;
oldPointer.x = e.clientX ;
oldPointer.y = e.clientY ;
isDrag = true ;
currentItem = this ;
}) ;
$(document).mousemove(function(e) {
var currentPointer = new Pointer(e.clientX, e.clientY) ;
if(!isDrag) return false ;
$(currentItem).css({
"opacity" : "0.8",
"z-index" : 999
}) ;
var left = currentPointer.x - oldPointer.x + oldPosition.left ;
var top = currentPointer.y - oldPointer.y + oldPosition.top ;
$(currentItem).css({
left : left,
top : top
}) ;
currentItem.pointer = currentPointer ;
// 开始交换位置
currentItem.collisionCheck() ;
}) ;
$(document).mouseup(function() {
if(!isDrag) return false ;
isDrag = false ;
currentItem.move(function() {
$(this).css({
"opacity" : "1",
"z-index" : 0
}) ;
}) ;
}) ;
}
this.init() ;
}) ;
})(jQuery)
</script>
为什么网页只显示第二个特效，第一个特效已经没有了。但是他们都有拖动的特效鼠标拖动。然而第一个特效的鼠标拖动失效了