eval MethodSee Also String ObjectApplies To: Global Object Requirements Version 1 Evaluates JScript code and executes it. eval(codeString) The required codeString argument is a string value that contains valid JScript code. This string is parsed by the JScript parser and executed.Res The eval function allows dynamic execution of JScript source code. For example, the following code creates a new variable mydate that contains a Date object: eval("var mydate = new Date();"); The code passed to the eval method is executed in the same context as the call to the eval method.
eval(str)
String ObjectApplies To: Global Object
Requirements
Version 1
Evaluates JScript code and executes it. eval(codeString)
The required codeString argument is a string value that contains valid JScript code. This string is parsed by the JScript parser and executed.Res
The eval function allows dynamic execution of JScript source code. For example, the following code creates a new variable mydate that contains a Date object: eval("var mydate = new Date();");
The code passed to the eval method is executed in the same context as the call to the eval method.
使用方法:
楼上的....
<input type=button onclick="check()">
<script>
function check(){
var obj="test"+1;
alert(obj.value);//代碼執行失敗
var obj=eval("test"+1);
alert(obj.value);//代碼執行成功
}
</script>
{
eval("x")();
}
function x()
{
alert("xxxx");
}