$(document).ready(function() {

    //Disable key < and > in all textboxes
    $("input").keypress(function(e) { 
        //if the letter is < or > then don't type anything
        if (e.which == 60 || e.which == 62 ) {
            //display error message
            return false;
        }
    });
    //Disable key < and > in all textareas
    $("textarea").keypress(function(e) {
    //if the letter is < or > then don't type anything
        if (e.which == 60 || e.which == 62) {
            //display error message
            return false;
        }
    });
});