$(document).ready(function () {
    var searchBox = $("#ctl00_txtSearch");
    searchBox.focus(function () {
        if (searchBox.val() == this.title) { // TextBox控件ToolTip属性转换为Html为title属性
            searchBox.val("");
        }
    });
    searchBox.blur(function () {
        if (searchBox.val() == "") {
            searchBox.val(this.title);
        }
    });
    searchBox.blur();
});

 

 

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