破程序搞得我浏览器都死掉了~~
到边不能拖动?if (x <= 0)
{
x = 0;
}
到边不能拖动?if (x <= 0)
{
x = 0;
}
解决方案 »
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我看这儿看挺好的呀。
if (x <= 0)
{
x = 0;
}
你的x哪来的?
<HTML>
<HEAD>
<TITLE> Document </TITLE>
<style type="text/css">
body{
margin : 0px;
background-color : #999999 ;
}
.DivMain {
position : absolute ;
text-align : center ;
overflow : hidden ;
}
.DivMenu {
position : absolute ;
text-align : left ;
overflow : hidden ;
visibility : hidden ;
}
.ImgMain {
position : absolute ;
overflow : hidden ;
border : 0px ;
}
.TBMain {
background-color : #CCCCCC ;
padding : 0px ;
border : 0px ;
z-index : 99 ;
line-height : 18px ;
}
</style><SCRIPT LANGUAGE="JavaScript">
<!-- var originalWidth;
var originalHeight;
var ObjDrag;function setInit(objImg) { originalWidth = objImg.width;
originalHeight = objImg.height;
fmImgZoom.Original.click();
}function setOriginal() { var objImg;
var objDivMain ;
var intBodyWidth ;
var intBodyHeight ; intBodyWidth = document.body.clientWidth ;
intBodyHeight = document.body.clientHeight ; objImg = document.getElementById("imgMain") ;
objDivMain = document.getElementById("divMain") ; objImg.style.left = 0 ;
objImg.style.top = 0 ;
objImg.style.width = originalWidth;
objImg.style.height = originalHeight;
objImg.style.zoom = 1 ; objDivMain.style.width = intBodyWidth ;
objDivMain.style.height = intBodyHeight - 20 ; fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}function initImg(objCurrent) { var intBodyWidth ;
var intBodyHeight ;
var objTbMain ;
var objDivMain ; intBodyWidth = document.body.clientWidth ;
intBodyHeight = document.body.clientHeight ; objTbMain = document.getElementById("tbMain") ;
objDivMain = document.getElementById("divMain") ; objTbMain.style.top = 0;
objTbMain.style.height = 20;
objTbMain.style.width = intBodyWidth;
objDivMain.style.left = 0 ;
objDivMain.style.height = intBodyHeight - 20 ;
objDivMain.style.width = intBodyWidth ; initZoom(objCurrent);
}function initZoom(obj){ var intObjWidth ;
var intObjHeight ;
var intDivHeight ;
var intZoomRatio ;
var objDivMain ;
var objTbMain; objDivMain = document.getElementById("DivMain");
objTbMain = document.getElementById("tbMain") ; intDivHeight = objDivMain.style.pixelHeight;
intObjHeight = obj.style.pixelHeight;
intZoomRatio = intDivHeight / intObjHeight; obj.style.zoom = intZoomRatio ;
obj.style.top = 0;
obj.style.left = 0; fnWritePos (obj.style.left,obj.style.top,obj.style.zoom) ;
}function setFitScreen() { var objImg; objImg = document.getElementById("imgMain") ;
initImg(objImg);
}function fnMouseDown(obj) {
ObjDrag=obj;
ObjDrag.setCapture();
ObjDrag.l=event.x-ObjDrag.style.pixelLeft;
ObjDrag.t=event.y-ObjDrag.style.pixelTop;
}function fnMouseMove() {
if(ObjDrag!=null) {
ObjDrag.style.left = event.x-ObjDrag.l;
ObjDrag.style.top = event.y-ObjDrag.t;
fnWritePos(ObjDrag.style.left,ObjDrag.style.top,ObjDrag.style.zoom);
}
}function fnMouseUp() {
if(ObjDrag!=null) {
ObjDrag.releaseCapture();
ObjDrag=null;
}
}function fnZoomIn() { var objImg; objImg = document.getElementById("imgMain") ;
objImg.style.zoom = parseFloat(objImg.style.zoom) + 0.01 ;
fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}function fnZoomOut() {
var objImg;
objImg = document.getElementById("imgMain") ;
if(objImg.style.zoom>0.01){
objImg.style.zoom = parseFloat(objImg.style.zoom) - 0.01 ;
fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}
}function fnDivMouseDown() {
if ( event.button == 2 && event.srcElement.id != "imgMain") {
setOriginal();
}
}function fnWritePos(intLeft,intTop,intZoom) {
var objbtnImgInfo;
objbtnImgInfo = document.getElementById("btnImgInfo") ;
objbtnImgInfo.innerText = " ImgLeft:" + intLeft + " ImgTop:" + intTop + " ImgZoom:" + intZoom ;
}function setDisplay() { var objImg; objImg = document.getElementById("imgMain") ; if(objImg.style.visibility == ""){
objImg.style.visibility = "hidden";
}
else{
objImg.style.visibility = "";
}
}function fnContextMenu() {
window.event.returnValue=false;
}
//-->
</SCRIPT>
</HEAD><BODY oncontextmenu="fnContextMenu()">
<form name="fmImgZoom">
<TABLE id="tbMain" class="TBMain">
<TR>
<TD height="20">
<input type="button" name="ZoomIn" value="ZoomIn" onclick="fnZoomIn()">
<input type="button" name="ZoomOut" value="ZoomOut" onclick="fnZoomOut()">
<input type="button" name="Original" value="Original" onclick="setOriginal()">
<input type="button" name="FitScreen" value="FitScreen" onclick="setFitScreen()">
<input type="button" name="FitScreen" value="hide/view" onclick="setDisplay()">
<input id="btnImgInfo" size="50">
</TD>
</TR>
</TABLE>
<div id="divMain" class="DivMain" onmousedown="fnDivMouseDown()"><img src="22.jpg" id="imgMain" class="imgMain" onload="setInit(this)" onmousedown="fnMouseDown(this)" onmousemove="fnMouseMove()" onmouseup="fnMouseUp()" ></div>
</form>
</BODY>
</HTML>
我要的是如果到了图片的边界,就拖不动鼠标。就像ACSEE看图一样。到了边界就拖不动了。。
<HTML>
<HEAD>
<TITLE> Document </TITLE>
<style type="text/css">
body{
margin : 0px;
background-color : #999999 ;
}
.DivMain {
position : absolute ;
text-align : center ;
overflow : hidden ;
}
.DivMenu {
position : absolute ;
text-align : left ;
overflow : hidden ;
visibility : hidden ;
}
.ImgMain {
position : absolute ;
overflow : hidden ;
border : 0px ;
}
.TBMain {
background-color : #CCCCCC ;
padding : 0px ;
border : 0px ;
z-index : 99 ;
line-height : 18px ;
}
</style><SCRIPT LANGUAGE="JavaScript">
<!-- var originalWidth;
var originalHeight;
var ObjDrag;function setInit(objImg) { originalWidth = objImg.width;
originalHeight = objImg.height;
fmImgZoom.Original.click();
}function setOriginal() { var objImg;
var objDivMain ;
var intBodyWidth ;
var intBodyHeight ; intBodyWidth = document.body.clientWidth ;
intBodyHeight = document.body.clientHeight ; objImg = document.getElementById("imgMain") ;
objDivMain = document.getElementById("divMain") ; objImg.style.left = 0 ;
objImg.style.top = 0 ;
objImg.style.width = originalWidth;
objImg.style.height = originalHeight;
objImg.style.zoom = 1 ; objDivMain.style.width = intBodyWidth ;
objDivMain.style.height = intBodyHeight - 20 ; fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}function initImg(objCurrent) { var intBodyWidth ;
var intBodyHeight ;
var objTbMain ;
var objDivMain ; intBodyWidth = document.body.clientWidth ;
intBodyHeight = document.body.clientHeight ; objTbMain = document.getElementById("tbMain") ;
objDivMain = document.getElementById("divMain") ; objTbMain.style.top = 0;
objTbMain.style.height = 20;
objTbMain.style.width = intBodyWidth;
objDivMain.style.left = 0 ;
objDivMain.style.height = intBodyHeight - 20 ;
objDivMain.style.width = intBodyWidth ; initZoom(objCurrent);
}function initZoom(obj){ var intObjWidth ;
var intObjHeight ;
var intDivHeight ;
var intZoomRatio ;
var objDivMain ;
var objTbMain; objDivMain = document.getElementById("DivMain");
objTbMain = document.getElementById("tbMain") ; intDivHeight = objDivMain.style.pixelHeight;
intObjHeight = obj.style.pixelHeight;
intZoomRatio = intDivHeight / intObjHeight; obj.style.zoom = intZoomRatio ;
obj.style.top = 0;
obj.style.left = 0; fnWritePos (obj.style.left,obj.style.top,obj.style.zoom) ;
}function setFitScreen() { var objImg; objImg = document.getElementById("imgMain") ;
initImg(objImg);
}function fnMouseDown(obj) {
ObjDrag=obj;
ObjDrag.setCapture();
ObjDrag.l=event.x-ObjDrag.style.pixelLeft;
ObjDrag.t=event.y-ObjDrag.style.pixelTop;
}function fnMouseMove() {
if(ObjDrag!=null) {
var objDivMain;
objDivMain = document.getElementById("DivMain") ;
if( event.x - ObjDrag.l >= objDivMain.style.pixelLeft){
ObjDrag.style.left = event.x-ObjDrag.l;
}
else{
ObjDrag.style.left = objDivMain.style.pixelLeft;
}
if( event.y - ObjDrag.t >= objDivMain.style.pixelTop){
ObjDrag.style.top = event.y-ObjDrag.t;
}
else{
ObjDrag.style.top = objDivMain.style.pixelTop;
}
fnWritePos(ObjDrag.style.left,ObjDrag.style.top,ObjDrag.style.zoom);
}
}function fnMouseUp() {
if(ObjDrag!=null) {
ObjDrag.releaseCapture();
ObjDrag=null;
}
}function fnZoomIn() { var objImg; objImg = document.getElementById("imgMain") ;
objImg.style.zoom = parseFloat(objImg.style.zoom) + 0.01 ;
fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}function fnZoomOut() {
var objImg;
objImg = document.getElementById("imgMain") ;
if(objImg.style.zoom>0.01){
objImg.style.zoom = parseFloat(objImg.style.zoom) - 0.01 ;
fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}
}function fnDivMouseDown() {
if ( event.button == 2 && event.srcElement.id != "imgMain") {
setOriginal();
}
}function fnWritePos(intLeft,intTop,intZoom) {
var objbtnImgInfo;
objbtnImgInfo = document.getElementById("btnImgInfo") ;
objbtnImgInfo.innerText = " ImgLeft:" + intLeft + " ImgTop:" + intTop + " ImgZoom:" + intZoom ;
}function setDisplay() { var objImg; objImg = document.getElementById("imgMain") ; if(objImg.style.visibility == ""){
objImg.style.visibility = "hidden";
}
else{
objImg.style.visibility = "";
}
}function fnContextMenu() {
window.event.returnValue=false;
}
//-->
</SCRIPT>
</HEAD><BODY oncontextmenu="fnContextMenu()">
<form name="fmImgZoom">
<TABLE id="tbMain" class="TBMain">
<TR>
<TD height="20">
<input type="button" name="ZoomIn" value="ZoomIn" onclick="fnZoomIn()">
<input type="button" name="ZoomOut" value="ZoomOut" onclick="fnZoomOut()">
<input type="button" name="Original" value="Original" onclick="setOriginal()">
<input type="button" name="FitScreen" value="FitScreen" onclick="setFitScreen()">
<input type="button" name="FitScreen" value="hide/view" onclick="setDisplay()">
<input id="btnImgInfo" size="50">
</TD>
</TR>
</TABLE>
<div id="divMain" class="DivMain" onmousedown="fnDivMouseDown()"><img src="22.jpg" id="imgMain" class="imgMain" onload="setInit(this)" onmousedown="fnMouseDown(this)" onmousemove="fnMouseMove()" onmouseup="fnMouseUp()" ></div>
</form>
</BODY>
</HTML>