// here i selected two same ids using jquery and prototype respectively. <script type="javascript"> jQuery.noConflict(); // for jqury selectors use jQuery instead of '$ like jQuery(document).ready( function(){ jQuery("id").css('color:red'); ... } );' // then here you can write the prototype script using '$' as selector. function myFun(){ $('id').setStyle({color:red;}) } </script>
You can replace $ with any other variable by indicating such before starting the script as var $v =jQuery.noConflict(); $v(document).ready( fun );