jquery files selector conflicting

I am using two libraries of jQuery. One is main library from site(I named it as mainlibrary.js) other as limitkeypress.js(named as same). I think both files are conflicting. I used code in sadd.php at line 24 as

<script type="text/javascript">  
$.noConflict(); 
$(document).ready(function() {
    $("#title").limitkeypress ({ rexp:/^[A-Za-z.\-\s]*$/ });
});
</script>

I got chrome error as

• limitkeypress.js:125 Uncaught ReferenceError: jQuery is not defined (anonymous function)

• sadd.php:24 Uncaught 开发者_运维知识库TypeError: Property '$' of object [object DOMWindow] is not a function (anonymous function)

Where as my limitkeypress file at line 125 end with code.. })(jQuery);

Firefox extension firebug issues same error as..

• $ is not a function

• sadd.php(). sadd.php (line 24)

• $(document).ready(function() {

What should I do in order avoid this error permanently. I mean if I use any other library. I won't have this error further.

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You use $.noConflict(), which unbinds $, then try to use it on the next line. jQuery should be available, if you're loading jQuery.

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If you are loading two versions of jquery you should have extra care because you need to use noconflict before loading the other. Look at this article an this example

<!-- load jQuery 1.1.3 -->
<script type="text/javascript" src="http://code.jquery.com/jquery-1.1.3.js"></script>
<script type="text/javascript" src="jquery.dimensions.min.js"></script>

<!-- revert global jQuery and $ variables and store jQuery in a new variable -->
<script type="text/javascript">
var jQuery_1_1_3 = $.noConflict(true);
</script>

<!-- load jQuery 1.3.2 -->
<script type="text/javascript" src="http://code.jquery.com/jquery-1.3.2.js"></script>

<!-- revert global jQuery and $ variables and store jQuery in a new variable -->
<script type="text/javascript">
var jQuery_1_3_2 = $.noConflict(true);
</script>

If you just want to use $ instead of jQuery, don't call noConflict