Javascript + and string return value from function?

This is a stupid noob issue that just pisses me off .. sorry.

• This works: alert('hello');
• This works: alert(getsomestring());
• This works: alert('hello'+'goodbye')
• So why doesn't this work: alert('hello'+getsomestring());

I tried these with no luck:

alert('hello'+getsomestring(););
alert('hello'+getsomestring().toString(););

thanks.

using it as follows:

<script language="JavaScript">
function getQueryString() { 
    var assoc = new Array(); 
    var queryString = unescape(location.search.substring(1)); 
    var keyValues = queryString.split('&'); 
    for (var i in keyValues) { 
        var key = keyValues[i].split('='); 
        assoc[key[0]] = key[1]; 开发者_运维技巧
    } 
    return assoc; 
} 



</script>

<script language="JavaScript">
alert('?h='+getQueryString()["search"];);
//localSearchHighlight('?h='+getQueryString()["search"]); 
);

</script>

Your code has syntax errors, in the second <script> block. It should read:

alert('?h='+getQueryString()["search"]);

• There was a ; inside the function call parens.
• You had an additional line with ); after your comment.

Other than that, it seems to work like you want it too.

Take a look in your browser's error console; alert('hello'+getsomestring();) is a syntax error due to the semicolon. Semicolons separate lines and shouldn't appear in expressions. Remove it, and the expressions will work (as you have it typed at first: alert('hello'+getsomestring());).

There are no associative arrays in JavaScript. Only objects map keys to values.

Replace var assoc = new Array(); with var assoc = new Object(); or the shorthand var assoc = {}; then it works.

Also there's an superflous ; in your alert:

alert('?h='+getQueryString()["search"];);
                                      ^ --------- SyntaxError: Unexpected token ;