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解析javascript 实用函数的使用详解
摘要:复制代码代码如下:functionaddBookMark(url,title){//将网页添加到收藏addBookMark(window.l...

复制代码 代码如下:

function addBookMark(url, title){

//将网页添加到收藏addBookMark(window.location,document.title)

if(document.all){

window.external.addFavorite(url,title);

}else if (window.sidebar){

window.sidebar.addPanel(title,url,'');

}else{

alert('添加失败');

}

}

function setHomepage(obj,url) {

// setHome(this, window.location)

try {

obj.style.behavior = 'url(#default#homepage)';

obj.setHomePage(url);

} catch (e) {

if (window.netscape) {

try {

netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");

} catch (e) {

alert('此操作被浏览器拒绝!n请在浏览器地址栏输入"about:config"并回车n然后将 [signed.applets.codebase_principal_support]的值设置为"true",双击即可。');

}

var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);

prefs.setCharPref('browser.startup.homepage', vrl);

}

}

}

function boxMove(box){

//可移动的层

var w = box.scrollWidth,h = box.scrollHeight;

var iWidth = document.documentElement.clientWidth;

var iHeight = document.documentElement.clientHeight;

var moveX = 0,moveY = 0,moveTop = 0,moveLeft = 0,moveable = false;

box.onmousedown = function(e){

moveable = true;

e = window.event?window.event:e;

moveX = e.clientX-box.offsetLeft;

moveY = e.clientY-box.offsetTop;

box.style.zIndex++;

}

document.onmousemove = function(e){

if(moveable){

e = window.event?window.event:e;

var x = e.clientX - moveX;

var y = e.clientY - moveY;

if ( x > 0 &&( x + w < iWidth) && y > 0 && (y + h < iHeight)){

box.style.left = x + "px";

box.style.top = y + "px";

box.style.margin = "auto";

}

}

}

document.onmouseup = function (){moveable = false;};

}

function getHtmlRoot(){

/*获得html文档的根元素*/

if(document.compatMode.toLowerCase()=="css1compat"){

htmlRoot = document.documentElement;

}else{

htmlRoot = document.body;

}

return htmlRoot;

}

function showWindow(boxId, closeId, showBg){//弹窗

htmlRoot = getHtmlRoot();

box = document.getElementById(boxId);

boxId = '#' + boxId;

closeId = '#' + closeId;

showBox = $(boxId);

showBox.show();

z_index = 20;

moveLeft = (htmlRoot.clientWidth- box.clientWidth)/2 + htmlRoot.scrollLeft +'px';

moveTop = (htmlRoot.clientHeight - box.clientHeight)/2 + htmlRoot.scrollTop;+'px';

showBox.css({position:'absolute', left:moveLeft,zIndex:z_index, top:moveTop});

boxMove(box);

if(showBg){

objMask = document.createElement("div");

objMask.className = "BoxMask";

htmlRoot.appendChild(objMask);

objMask.style.cssText += 'position:absolute;top:0; left:0;filter:Alpha(Opacity=50);opacity:0.5;background:#AAA;';

objMask.style.zIndex = z_index -1;

objMask.style.width = htmlRoot.clientWidth + 'px';

objMask.style.height = htmlRoot.scrollHeight + htmlRoot.scrollTop + 'px';

}

$(closeId).click(function(){

showBox.hide();

mybg.style.display = "none";

});

$('.closeBtn').click = function(){

showBox.hide();

mybg.style.display = "none";

};

}

function getFormQuery(formId){

/*生成查询字串*/

formObj = document.getElementById(formId);

var i, queryString = "", and = "", itemValue;

for(i = 0; i<formObj.length; i++ ){

var item = formObj[i];

if ( item.name!='' ){

if(item.type == 'select-one'){

itemValue = item.options[item.selectedIndex].value;

}else if ( item.type=='checkbox' || item.type=='radio'){

if ( item.checked == false ){ continue; }

itemValue = item.value;

}else if ( item.type == 'button' || item.type == 'submit' || item.type == 'reset' || item.type == 'image'){

continue;

}else{

itemValue = item.value;

}

// itemValue = escape(itemValue);

queryString += and + item.name + '=' + itemValue;

and="&";

//queryString += and + encodeURIComponent(item.name) + '=' +encodeURIComponent( itemValue);

}

}

return queryString;

}

//定义js错误处理函数

onerror = errHandle;

function errHandle(msg,url,line){

var txt=""

txt = "本页中有错误!nn"

txt += "错误: "+ msg +"n"

txt += "地址: " + url + "n"

txt += "行数: " + line + "nn"

alert(txt);

return false;

}

function setAutoWidth(id,width,size){

//最小或最大宽度

var obj = document.getElementById(id);

if(size=='max'){

obj.style.width = (obj.clientWidth > width) ? width + "px" : "auto";

}else{

obj.style.width = (obj.clientWidth < width) ? width + "px" : "auto";

}

}

function fontScroll(id){

/*向左滚动的文字 */

var obj = document.getElementById(id);

var text = obj.innerHTML;

var first = text.charAt(0);

var left = text.substring(1, text.length);

obj.inerHTML = left + first;

//这个写函数之外 setInterval('fontScroll(id)', 500);

}

function bubbleSort(arr){

/*冒泡排序法*/

var sign = false // 初始化换位标记为假

for(var i=0; i < arr.length-1; i++){

for(varj=0; j < arr.length-1-i; j++){

if(arr[j]> arr[j+1]){

vartemp = arr[j]

arr[j]= arr[j+1]

arr[j+1]= temp

sign= true // 若当前这一圈比较中,有过换位,则置换位标记为真

}

}

if(sign)// 判断当前这一圈有过换位否…

sign= false // 有过换位,则重置换位标记为假

else

break// 没有,则终止

}

return arr;

}

function getCoordinate(evt){

/*获得光标的坐标*/

var x = evt.clientX;

var y = evt.clientY;

document.getElementById('show').innerHTML = x +' &' + y;

}

function checkEmail(email){

/*检测多个以分号(;)分隔的Email格式*/

if(email != null){

if(email.indexOf(";",0) == -1){ //indexOf(被查找,起始位)返某个字符串在源字符串中首次出现的位置,失败返回-1

if(!isEmail(email)){

alert("单个邮件格式有误,请重输!");

document.getElementById("email").focus();

return false;

}

}else{

var emailArr = email.split(";");//split(分隔段,数组总长度)字符串分割成字符串数组

var i, iMax = emailArr.length;

for(i = 0; i < iMax; i++){

if(emailArr[i] != null || emailArr != ""){

if(!isEmail(emailArr[i])){

alert("多个邮箱格式中有邮箱格式不正确,请重新核对后再输入!");

document.getElementById("email").focus();

return false;

}

}

}

}

}

function isEmail(str){

var reg = /^(w)+(.w+)*@(w)+((.w+)+)$/;

return reg.test(str);//test(被测字串)检测一个字符串是否匹配某个模式.

}

}

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