value is undefined in javascript

Question

Take a look at this:

if(session.getAttribute("mode")!=null){
    mode = (String)session.getAttribute("mode");
}

The first time value for the mode is empty so I set the mode value to a script variable like this:

var mode='<%=mode%>';

below is the method in which I call on load of the form, but it says mode is undefined

bodyOnLoad();
var mode='<%=mode%>';
alert("mode : "+mode);
function bodyOnLoad() {
    if(mode.length < 0){
        alert("mode empty 111111");
        document.getElementById("functiontype").value="view";
        document.getElementById("page").value="1";
        document.forms["frmTempcard"].submit(); 
        return;
    }                       
}

Can anyone help me with this?

Note that you are calling the function bodyOnLoad before you set the value of mode. — Felix Kling
– Felix Kling, Commented Aug 9, 2012 at 10:05

xdazz · Accepted Answer · 2012-08-09 10:06:18Z

3

Declare the variable first. The mode is undefined when you call the function bodyOnLoad.

var mode='<%=mode%>';
bodyOnLoad();

answered Aug 9, 2012 at 10:06

xdazz

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Java Questions Over a year ago

thanks @xdazz it helped but now the form is not getting submitted even when the mode becomes empty, am i making any problem here ` if(mode.length < 0)`

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