/*对话开始*/
var dd;
function divstyle() {
    this.style.width = "100%";
    this.style.height = "100%";
    this.style.position = "absolute";
    this.style.left = 0;
    this.style.top = 0;
    this.style.background = "#000";
    this.style.filter = "alpha(opacity:30)";
}
function showdialog(strDialog) {
    var dialog = document.getElementById(strDialog);
    dialog.style.display = "block";
    dd = document.createElement("div");
    dialog.call(dd);
    document.body.appendChild(dd);
}
function hidialog(strDialog) {
    var dialog = document.getElementById(strDialog);
    dialog.style.display = "none";
    document.body.removeChild(dd);
} 
//对话框结束