用easyui动态创建一个对话框

function randomString(len) {
　　len = len || 32;
　　var $chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';    /****默认去掉了容易混淆的字符oOLl,9gq,Vv,Uu,I1****/
　　var maxPos = $chars.length;
　　var pwd = '';
　　for (i = 0; i < len; i++) {
　　　　pwd += $chars.charAt(Math.floor(Math.random() * maxPos));
　　}
　　return pwd;
}

function CreatSaveDialog(title,url,Dialog_w,Dialog_h){
 
 var div_id=randomString(5);
 var iframe_id=randomString(6);
 if (Dialog_w==null){
   Dialog_w=500;
 }else{
    if (Dialog_w>=$(window).width()){
     Dialog_w=$(window).width()-50;
     } 
 };
 if (Dialog_h==null){
   Dialog_h=300;
 }else{
    if (Dialog_h>=$(window).height()){
     Dialog_h=$(window).height()-50;
     } 
 };
 
 
 var htmlcontent='<div id="'+div_id+'" class="easyui-dialog" closed="true" style="'+Dialog_w+'px;height:'+Dialog_h+'px;padding:10px;">';
 htmlcontent=htmlcontent+'<iframe scrolling="no" id="'+iframe_id+'" frameborder="0"  src="'+url+'" style="100%;height:99%;"></iframe>';
 htmlcontent=htmlcontent+'</div>';
 $(document.body).append(htmlcontent);
 div_id='#'+div_id;
 //$.parser.parse($(div_id).parent()); 这一句是直接生成。
 $(div_id).dialog({
                closed : false,
                title : title,
                shadow : true,
                modal : true,
    cache : false,
            });
 
 }