Passing parameter to page using Javascript

This is an example method using javascript to redirect to the searching page with a parameter from the textbox when click the submits button.

Requirement

• JQuery library

HTML

  <div class="input-group search-btn">  
       <input id="textSearch" type="text" onkeypress="keypressSearch(e);" class="form-control">  
       <span class="input-group-btn">  
        <button class="btn btn-default" onclick="return Search();return false;" type="button">SEARCH</button>  
       </span>  
      </div>  

Javascript

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>  
  <script type="text/javascript">   
    function Search() {   
     var txtField = jQuery("#textSearch").val();   
     document.location.href = "/Search.aspx?searchtext=" + txtField + "&searchmode=anyword";   
     return false;   
    }   
    function keypressSearch(event) {   
     if (event.keyCode == 13) {   
      Search();   
      return false;   
     }   
     else {   
     }   
    }     
   </script>