jQuery.globalEval()方法

var name = "全局变量";
$(function () { 
　　 function test(){
        var name = "局部变量";
        alert(name); // 局部变量
        eval( "alert(name);" ); // 局部变量
        $.globalEval( "alert(name);" );  // 全局变量
    }
    test();
})

定义和用法

jQuery.globalEval() 函数用于全局性地执行一段JavaScript代码。

提示：该函数的作用与常规的JavaScript eval()函数相似。不同的是，jQuery.globalEval()执行代码的作用域为全局作用域。

语法

$.globalEval( code )

参数	描述
code	String类型 指定的需要运行的JavaScript代码字符串。

eval动态操作easyui的表格

　　　　　　  var express = "";
            //表达式
            for (var i = 0; i < cmds.length; i++) {
                var isNum = $.isNumeric(cmds[i].value);
                var sValue = isNum ?"(" + cmds[i].value + "*1.00)" : ("(row['" + cmds[i].value + "']*1.00)");
                if (i == cmds.length - 1)
                    express += "((row['" + cmds[i].col_id + "']*1.00)" + oper(cmds[i].operator) + sValue + ")";
                else
                    express += "((row['" + cmds[i].col_id + "']*1.00)" + oper(cmds[i].operator) + sValue + ")" + oper(cmds[i].operatorx);
            }

            for (var j = 0; j < rows.length; j++) {
                var row = rows[j];
                try {
                    var result = eval(express);
                    if (result > 9999999 || result < -99999999) continue;//正，负无穷不处理
                    var index = that.getRowIndex(row);
                    that.startGridEdit(index);
                    var edCol = that.getCurrnetEditor(col);
                    if (edCol) edCol.target.numberbox("setValue", result);
                } catch (err) { }
            }

            that.stopGridEdit();

　　

            //局部函数
            function updateRow(row) {
                that.updateRow(that.getRowIndex(row), row);
            }
            
            var cmd = "row['" + col + "'] = ";
            var express = "";
            //表达式
            for (var i = 0; i < cmds.length; i++) {
                var isNum = $.isNumeric(cmds[i].value);
                var sValue = isNum ? cmds[i].value : ("row['" + cmds[i].value + "']");
                if(i==cmds.length - 1)
                    express += "(row['" + cmds[i].col_id + "']" + oper(cmds[i].operator) + sValue + ")";
                else
                    express += "(row['" + cmds[i].col_id + "']" + oper(cmds[i].operator) + sValue + ")" + oper(cmds[i].operatorx);

            }
            cmd += express + ";updateRow(row);";

            //var colOpt = that.currentGrid.grid('getColumnOption', col);
            for (var j = 0; j < rows.length; j++) {
                var row = rows[j];
                try {
                    //that.startGridEdit(that.getRowIndex(row));
                    eval(cmd);
                } catch (err) { }
            }
            */