$.append (); is not working from an external javascript

[Emma]

I am trying to add a navigation bar on top and because i will lots of separate html file, i want to keep the navigation in one file, so incase i make changes it changes in all the pages. If i enter the code in the page itself it works just fine but when its in an external file it gives a different view.The Jquery snippet is:\[code\]var snippet = ' <div id="topMainNav">' + ' <ul>' + ' <li class="mainNav">' + ' <a href="" class="navlink">Find a Doctor</a>' + ' </li>' + ' <li class="mainNav">' + ' <a href="" class="navlink">Why Interfaith</a>' + ' <div class="dropdown" id="dropdown_one">' + ' <div class="subMainNav" style="padding: 10px;">History & Mission</div>' + ' <div class="subMainNav" style="padding: 10px;">Executive Director</div>' + ' <div class="subMainNav" style="padding: 10px;">Locations & Directions</div>' + ' <div class="subMainNav" style="padding: 10px;">Service Centers</div>' + ' <div class="subMainNav" style="padding: 10px;">Career Opportunities</div>' + ' <div class="subMainNav" style="padding: 10px;">News & Events</div>' + ' <div class="subMainNav" style="padding: 10px;">Parking</div>' + ' <div class="subMainNav" style="padding: 10px;">Places To Stay</div>' + ' </div>' + ' </li>' + ' <li class="mainNav">' + ' <a href="" class="navlink">Medical Services</a>' + ' <div class="dropdown" id="dropdown_two">' + ' <div class="subMainNav" style="padding: 10px;"><a href="http://stackoverflow.com/questions/11460737/#">Behavioral Health</a></div>' + ' <div class="subMainNav" style="padding: 10px;">Clinical Laboratory</div>' + ' <div class="subMainNav" style="padding: 10px;">Dentistry</div>' + ' <div class="subMainNav" style="padding: 10px;">Emergency</div>' + ' <div class="subMainNav" style="padding: 10px;">Gynecology</div>' + ' <div class="subMainNav" style="padding: 10px;">Medicine</div>' + ' <div class="subMainNav" style="padding: 10px;">Pastoral</div>' + ' <div class="subMainNav" style="padding: 10px;">Pediatrics</div>' + ' <div class="subMainNav" style="padding: 10px;">Physical Medicine & Rehab</div>' + ' <div class="subMainNav" style="padding: 10px;">Radiology</div>' + ' <div class="subMainNav" style="padding: 10px;">Surgery</div>' + ' <div class="subMainNav" style="padding: 10px;">Other Services</div>' + ' </div>' + ' </li>' + ' <li class="mainNav">' + ' <a href="" class="navlink">Medical Trainings</a>' + ' <div class="dropdown" id="dropdown_three">' + ' <div class="subMainNav" style="padding: 10px;">Medical Training</div>' + ' <div class="subMainNav" style="padding: 10px;">Behavioral Health</div>' + ' <div class="subMainNav" style="padding: 10px;">Predoctoral Externship</div>' + ' <div class="subMainNav" style="padding: 10px;">Podiatric Residency</div>' + ' <div class="subMainNav" style="padding: 10px;">Dental Residency</div>' + ' <div class="subMainNav" style="padding: 10px;">Pulmonary Residency</div>' + ' </div>' + ' </li>' + ' <li class="mainNav">' + ' <a href="" class="navlink">For Patients & Visitors</a>' + ' <div class="dropdown" id="dropdown_four">' + ' <p><a href="http://stackoverflow.com/questions/11460737/#">This is a Link</a></p>' + ' <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin blandit sodales justo, id fringilla eros dapibus vitae. Morbi molestie enim diam, a vulputate neque. Morbi sit amet nunc.</p>' + ' </div>' + ' </li>' + ' <li class="mainNav">' + ' <a href="" class="navlink">Contact Us</a>' + ' </li>' + ' </ul>' + '</div>';$(function(){$('.writeNav').append (snippet);});\[/code\]on my HTML page i have the following:\[code\]calling the external jscript file:<script type="text/javascript" src="http://stackoverflow.com/questions/11460737/theScriptsStyles/miscScripts.js"></script>\[/code\]and in the body of the html i have this:\[code\]<div class="writeNav"></div>\[/code\]What its suppose to do is, have a pull down menu, so as i put my mouse over it has a slide down menu which is not working. Anyone can please tell me what i am doing wrong.Thanks