<!--
/*

showPages v1.1
=================================

Infomation
----------------------
Author : Lapuasi
E-Mail : lapuasi@gmail.com
Web : http://www.lapuasi.com
Date : 2005-11-17


Example
----------------------
var pg = new showPages('pg');
pg.pageCount = 12; //定义总页数(必要)
pg.argName = 'p';    //定义参数名(可选,缺省为page)
pg.printHtml();        //显示页数


Supported in Internet Explorer, Mozilla Firefox
*/

function showPages(name) { //初始化属性
        this.name = name;      //对象名称
        this.page = 1;         //当前页数
        this.pageCount = 1;    //总页数
        this.argName = 'page'; //参数名
        this.showTimes = 1;    //打印次数
}

showPages.prototype.getPage = function(){ //丛url获得当前页数,如果变量重复只获取最后一个
        var args = location.search;
        var reg = new RegExp('[\?&]?' + this.argName + '=([^&]*)[&$]?', 'gi');
        var chk = args.match(reg);
        this.page = RegExp.$1;
}
showPages.prototype.checkPages = function(){ //进行当前页数和总页数的验证
        if (isNaN(parseInt(this.page))) this.page = 1;
        if (isNaN(parseInt(this.pageCount))) this.pageCount = 1;
        if (this.page < 1) this.page = 1;
        if (this.pageCount < 1) this.pageCount = 1;
        if (this.page > this.pageCount) this.page = this.pageCount;
        this.page = parseInt(this.page);
        this.pageCount = parseInt(this.pageCount);
}
showPages.prototype.createHtml = function(mode){ //生成html代码
        var strHtml = '', prevPage = this.page - 1, nextPage = this.page + 1;
        if (mode == '' || typeof(mode) == 'undefined') mode = 0;
        switch (mode) {
                case 0 : //模式1 (页数,' + page_F + ',前页,后页,尾页)
                        strHtml += '<span class="count">' + page_page + this.page + ' / ' + this.pageCount + '</span>';
                        strHtml += '<span class="number">';
                        if (prevPage < 1) {
                                strHtml += '<span title="First Page">' + page_F + '</span>';
                                strHtml += '<span title="Prev Page">' + page_P + '</span>';
                        } else {
                                strHtml += '<span title="First Page"><a href="javascript:' + this.name + '.toPage(1);">' + page_F + '</a></span>';
                                strHtml += '<span title="Prev Page"><a href="javascript:' + this.name + '.toPage(' + prevPage + ');">' + page_P + '</a></span>';
                        }
                        for (var i = 1; i <= this.pageCount; i++) {
                                if (i > 0) {
                                        if (i == this.page) {
                                                strHtml += '<span title="Page ' + i + '">[' + i + ']</span>';
                                        } else {
                                                strHtml += '<span title="Page ' + i + '"><a href="javascript:' + this.name + '.toPage(' + i + ');">[' + i + ']</a></span>';
                                        }
                                }
                        }
                        if (nextPage > this.pageCount) {
                                strHtml += '<span title="Next Page">' + page_N + '</span>';
                                strHtml += '<span title="Last Page">' + page_L + '</span>';
                        } else {
                                strHtml += '<span title="Next Page"><a href="javascript:' + this.name + '.toPage(' + nextPage + ');">' + page_N + '</a></span>';
                                strHtml += '<span title="Last Page"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">' + page_L + '</a></span>';
                        }
                        strHtml += '</span><br />';
                        break;
                case 1 : //模式1 (10页缩略,' + page_F + ',前页,后页,尾页)
                        strHtml += '<span class="count">' + page_page + this.page + ' / ' + this.pageCount + '</span>';
                        strHtml += '<span class="number">';
                        if (prevPage < 1) {
                                strHtml += '<span title="First Page">' + page_F + '</span>';
                                strHtml += '<span title="Prev Page">' + page_P + '</span>';
                        } else {
                                strHtml += '<span title="First Page"><a href="javascript:' + this.name + '.toPage(1);">' + page_F + '</a></span>';
                                strHtml += '<span title="Prev Page"><a href="javascript:' + this.name + '.toPage(' + prevPage + ');">' + page_P + '</a></span>';
                        }
                        if (this.page % 10 ==0) {
                                var startPage = this.page - 9;
                        } else {
                                var startPage = this.page - this.page % 10 + 1;
                        }
                        if (startPage > 10) strHtml += '<span title="Prev 10 Pages"><a href="javascript:' + this.name + '.toPage(' + (startPage - 1) + ');">...</a></span>';
                        for (var i = startPage; i < startPage + 10; i++) {
                                if (i > this.pageCount) break;
                                if (i == this.page) {
                                        strHtml += '<span title="Page ' + i + '">[' + i + ']</span>';
                                } else {
                                        strHtml += '<span title="Page ' + i + '"><a href="javascript:' + this.name + '.toPage(' + i + ');">[' + i + ']</a></span>';
                                }
                        }
                        if (this.pageCount >= startPage + 10) strHtml += '<span title="Next 10 Pages"><a href="javascript:' + this.name + '.toPage(' + (startPage + 10) + ');">...</a></span>';
                        if (nextPage > this.pageCount) {
                                strHtml += '<span title="Next Page">' + page_N + '</span>';
                                strHtml += '<span title="Last Page">' + page_L + '</span>';
                        } else {
                                strHtml += '<span title="Next Page"><a href="javascript:' + this.name + '.toPage(' + nextPage + ');">' + page_N + '</a></span>';
                                strHtml += '<span title="Last Page"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">' + page_L + '</a></span>';
                        }
                        strHtml += '</span><br />';
                        break;
                case 2 : //模式2 (前后缩略,页数,' + page_F + ',前页,后页,尾页)
                        strHtml += '<span class="count">' + page_page + this.page + ' / ' + this.pageCount + '</span>';
                        strHtml += '<span class="number">';
                        if (prevPage < 1) {
                                strHtml += '<span title="First Page">' + page_F + '</span>';
                                strHtml += '<span title="Prev Page">' + page_P + '</span>';
                        } else {
                                strHtml += '<span title="First Page"><a href="javascript:' + this.name + '.toPage(1);">' + page_F + '</a></span>';
                                strHtml += '<span title="Prev Page"><a href="javascript:' + this.name + '.toPage(' + prevPage + ');">' + page_P + '</a></span>';
                        }
                        if (this.page != 1) strHtml += '<span title="Page 1"><a href="javascript:' + this.name + '.toPage(1);">[1]</a></span>';
                        if (this.page >= 5) strHtml += '<span>...</span>';
                        if (this.pageCount > this.page + 2) {
                                var endPage = this.page + 2;
                        } else {
                                var endPage = this.pageCount;
                        }
                        for (var i = this.page - 2; i <= endPage; i++) {
                                if (i > 0) {
                                        if (i == this.page) {
                                                strHtml += '<span title="Page ' + i + '">[' + i + ']</span>';
                                        } else {
                                                if (i != 1 && i != this.pageCount) {
                                                        strHtml += '<span title="Page ' + i + '"><a href="javascript:' + this.name + '.toPage(' + i + ');">[' + i + ']</a></span>';
                                                }
                                        }
                                }
                        }
                        if (this.page + 3 < this.pageCount) strHtml += '<span>...</span>';
                        if (this.page != this.pageCount) strHtml += '<span title="Page ' + this.pageCount + '"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">[' + this.pageCount + ']</a></span>';
                        if (nextPage > this.pageCount) {
                                strHtml += '<span title="Next Page">' + page_N + '</span>';
                                strHtml += '<span title="Last Page">' + page_L + '</span>';
                        } else {
                                strHtml += '<span title="Next Page"><a href="javascript:' + this.name + '.toPage(' + nextPage + ');">' + page_N + '</a></span>';
                                strHtml += '<span title="Last Page"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">' + page_L + '</a></span>';
                        }
                        strHtml += '</span><br />';
                        break;
                case 3 : //模式3 (箭头样式,' + page_F + ',前页,后页,尾页) (only IE)
                        strHtml += '<span class="count">' + page_page + this.page + ' / ' + this.pageCount + '</span>';
                        strHtml += '<span class="arrow">';
                        if (prevPage < 1) {
                                strHtml += '<span title="First Page">9</span>';
                                strHtml += '<span title="Prev Page">7</span>';
                        } else {
                                strHtml += '<span title="First Page"><a href="javascript:' + this.name + '.toPage(1);">9</a></span>';
                                strHtml += '<span title="Prev Page"><a href="javascript:' + this.name + '.toPage(' + prevPage + ');">7</a></span>';
                        }
                        if (nextPage > this.pageCount) {
                                strHtml += '<span title="Next Page">8</span>';
                                strHtml += '<span title="Last Page">:</span>';
                        } else {
                                strHtml += '<span title="Next Page"><a href="javascript:' + this.name + '.toPage(' + nextPage + ');">8</a></span>';
                                strHtml += '<span title="Last Page"><a href="javascript:' + this.name + '.toPage(' + this.pageCount + ');">:</a></span>';
                        }
                        strHtml += '</span><br />';
                        break;
                case 4 : //模式4 (下拉框)
                        if (this.pageCount < 1) {
                                strHtml += '<select name="toPage" disabled>';
                                strHtml += '<option value="0">No Pages</option>';
                        } else {
                                var chkSelect;
                                strHtml += '<select name="toPage" onchange="' + this.name + '.toPage(this);">';
                                for (var i = 1; i <= this.pageCount; i++) {
                                        if (this.page == i) chkSelect=' selected="selected"';
                                        else chkSelect='';
                                        strHtml += '<option value="' + i + '"' + chkSelect + '>' + page_page + i + ' / ' + this.pageCount + '</option>';
                                }
                        }
                        strHtml += '</select>';
                        break;
                case 5 : //模式5 (输入框)
                        strHtml += '<span class="input">';
                        if (this.pageCount < 1) {
                                strHtml += '<input type="text" name="toPage" value="No Pages" class="itext" disabled="disabled">';
                                strHtml += '<input type="button" name="go" value="GO" class="ibutton" disabled="disabled"></option>';
                        } else {
                                strHtml += '<input type="text" value="Input Page:" class="ititle" readonly="readonly">';
                                strHtml += '<input type="text" id="pageInput' + this.showTimes + '" value="' + this.page + '" class="itext" title="Input page" onkeypress="return ' + this.name + '.formatInputPage(event);" onfocus="this.select()">';
                                strHtml += '<input type="text" value=" / ' + this.pageCount + '" class="icount" readonly="readonly">';
                                strHtml += '<input type="button" name="go" value="GO" class="ibutton" onclick="' + this.name + '.toPage(document.getElementById(\'pageInput' + this.showTimes + '\').value);"></option>';
                        }
                        strHtml += '</span>';
                        break;
                default :
                        strHtml = 'Javascript showPage Error: not find mode ' + mode;
                        break;
        }
        return strHtml;
}
showPages.prototype.createUrl = function (page) { //生成页面跳转url
        if (isNaN(parseInt(page))) page = 1;
        if (page < 1) page = 1;
        if (page > this.pageCount) page = this.pageCount;
        var url = location.protocol + '//' + location.host + location.pathname;
        var args = location.search;
        var reg = new RegExp('([\?&]?)' + this.argName + '=[^&]*[&$]?', 'gi');
        args = args.replace(reg,'$1');
        if (args == '' || args == null) {
                args += '?' + this.argName + '=' + page;
        } else if (args.substr(args.length - 1,1) == '?' || args.substr(args.length - 1,1) == '&') {
                        args += this.argName + '=' + page;
        } else {
                        args += '&' + this.argName + '=' + page;
        }
        return url + args;
}
showPages.prototype.toPage = function(page){ //页面跳转
        var turnTo = 1;
        if (typeof(page) == 'object') {
                turnTo = page.options[page.selectedIndex].value;
        } else {
                turnTo = page;
        }
        self.location.href = this.createUrl(turnTo);
}
showPages.prototype.printHtml = function(mode){ //显示html代码
        this.getPage();
        this.checkPages();
        this.showTimes += 1;
        document.write('<div id="pages_' + this.name + '_' + this.showTimes + '" class="pages"></div>');
        document.getElementById('pages_' + this.name + '_' + this.showTimes).innerHTML = this.createHtml(mode);
        
}
showPages.prototype.formatInputPage = function(e){ //限定输入页数格式
        var ie = navigator.appName=="Microsoft Internet Explorer"?true:false;
        if(!ie) var key = e.which;
        else var key = event.keyCode;
        if (key == 8 || key == 46 || (key >= 48 && key <= 57)) return true;
        return false;
}
//-->
