未捕获的SyntaxError：意外的字符串

Question

I'm having difficulty getting the following to work, all I get from Chrome's Console is Uncaught SyntaxError: Unexpected string .

I have tried tmp = event.keyCode and changing tmp in the if statement to event.keyCode but I cannot identify the problem.

 function showSearching() { alert ("Hello World"); } $('#search').bind('keydown', function() { tmp = Number(event.keyCode); if ( ( tmp=<"48" && tmp=>"90" ) || ( tmp=<"96" && tmp=>"111" ) || ( tmp=<"186" && tmp=>"222" ) ) { showSearching(); } }); 

 <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script> <input id="search" type="text"> 

Answer 1

Wrong syntax of relational operator in if statement.

change => to >= and =< to <=

$('#search').bind('keydown', function() {
    tmp = Number(event.keyCode);
    if ((tmp  <= "48" && tmp  >= "90") || (tmp  <= "96" && tmp  >= "111") || (tmp  <= "186" && tmp  >= "222")) {
        showSearching();
    }
});​

Answer 2

将=<更改为<=

if ( ( tmp<="48" && tmp>="90" )