function $(id){
    return document.getElementById(id);
}

//根据不通用屏幕分辨率设定Grid高度 LWP 2012-10-13
function initDialog(){
    var winScreenHeight = 0;
    var winScreenWidth = 0;
    if(window.screen.height){
        winScreenHeight = window.screen.height;
    }
    if(window.screen.width){
        winScreenWidth = window.screen.width;
    }
    if(winScreenWidth >= 1440 && winScreenWidth >= 900){
        document.getElementById("mygrid").style.height = "420px";
    }else if(winScreenWidth >= 1366 && winScreenWidth >= 768){
        document.getElementById("mygrid").style.height = "340px";
    }else if(winScreenWidth >= 1024 && winScreenWidth >= 768){
        document.getElementById("mygrid").style.height = "300px";
    }
}

function newGuid()
{
    var guid = "";
    for (var i = 1; i <= 32; i++){
      var n = Math.floor(Math.random()*16.0).toString(16);
       guid +=    n;
      if((i==8)||(i==12)||(i==16)||(i==20))
         guid += "-";
     }
    return guid.toUpperCase();    
}

//转换函数（将数组转为字符串）  LWP 2012-10-13
function dotransition(paraobj)
{
    var tem_str = "";
    for(var i=0;i<paraobj.length;i++)
    {
        tem_str += paraobj[i] + ",";
    }
    tem_str = tem_str.substring(0,tem_str.length-1);
    return tem_str;
}

function PagerView(id){
    var self = this;
    this.id = id;
    this.container = null;
    this.index = 1; // 当前页码, 从1开始
    this.size = page_count; // 每页显示记录数
    this.maxButtons = 9; // 显示的分页按钮数量
    this.itemCount = 0; // 记录总数
    this.pageCount = 0; // 总页数
    /**
     * 控件使用者重写本方法, 获取翻页事件, 可用来向服务器端发起AJAX请求.
     * @param index: 被点击的页码.
     */
    this.onclick = function(index){
    };
    /**
     * 内部方法.
     */
    this._onclick = function(index){
	    self.index = index;
	    self.onclick(index);
	    self.render();
    };
    /**
     * 在显示之前计算各种页码变量的值.
     */
    this.calculate = function(){
	    self.pageCount = parseInt(Math.ceil(self.itemCount / self.size));
	    self.index = parseInt(self.index);
	    if(self.index > self.pageCount){
		    self.index = self.pageCount;
	    }
    };
    /**
     * 渲染分页控件.
     */
    this.render = function(){
	    if(self.id != undefined){
		    var div = document.getElementById(self.id);
		    div.view = self;
		    self.container = div;
	    }
	    self.calculate();
	    var start, end;
	    start = Math.max(1, self.index - parseInt(self.maxButtons/2));
	    end = Math.min(self.pageCount, start + self.maxButtons - 1);
	    start = Math.max(1, end - self.maxButtons + 1);
	    var str = "";
	    str += "<div class=\"PagerView\">\n";
	    if(self.pageCount > 1){
		    if(self.index != 1){
			    str += '<a href="javascript://1"><span>|&lt;</span></a>';
			    str += '<a href="javascript://' + (self.index-1) + '"><span>&lt;&lt;</span></a>';
		    }else{
			    str += '<span>|&lt;</span>';
			    str += '<span>&lt;&lt;</span>';
		    }
	    }
	    for(var i=start; i<=end; i++){
		    if(i == this.index){
			    str += '<span class="on">' + i + "</span>";
		    }else{
			    str += '<a href="javascript://' + i + '"><span>' + i + "</span></a>";
		    }
	    }
	    if(self.pageCount > 1){
		    if(self.index != self.pageCount){
			    str += '<a href="javascript://' + (self.index+1) + '"><span>&gt;&gt;</span></a>';
			    str += '<a href="javascript://' + self.pageCount + '"><span>&gt;|</span></a>';
		    }else{
			    str += '<span>&gt;&gt;</span>';
			    str += '<span>&gt;|</span>';
		    }
	    }
	    str += ' 一共' + self.pageCount + '页, ' + self.itemCount + '条记录 '+'&nbsp;&nbsp;&nbsp;每页显示:&nbsp;'+"<select id=\"cusShowCount\" style=\"width:70px;\" onchange=\"changeShowCount('cusShowCount')\">"+getPageOption()+"</select>";
	    str += "</div><!-- /.pagerView -->\n";
	    self.container.innerHTML = str;
	    var a_list = self.container.getElementsByTagName('a');
	    for(var i=0; i<a_list.length; i++){
		    a_list[i].onclick = function(){
			    var index = this.getAttribute('href');
			    if(index != undefined && index != ''){
				    index = parseInt(index.replace('javascript://', ''));
				    self._onclick(index)
			    }
			    return false;
		    };

	    }
    };
}

function getPageOption(){
    var pageCountArg = new Array();
    pageCountArg.push(15);
    pageCountArg.push(30);
    pageCountArg.push(50);
    pageCountArg.push(100);
    pageCountArg.push(200);
    
    var optionStr = "";
    for(var i = 0;i<pageCountArg.length;i++){
         if(page_count == parseInt(pageCountArg[i])){
             optionStr += "<option value=\""+pageCountArg[i]+"\" selected=\"1\">"+pageCountArg[i]+"</option>";
         }else{
             optionStr += "<option value=\""+pageCountArg[i]+"\">"+pageCountArg[i]+"</option>";
         }
    }
    
    return optionStr;
    ;
}