void RegisterKeyHandlerClientScript () {
if (!Page.ClientScript.IsClientScriptBlockRegistered (typeof (TextBox), "KeyHandler")) {
StringBuilder script=new StringBuilder();
script.AppendLine ("function WebForm_TextBoxKeyHandler(event) {");
script.AppendLine ("\tvar target = event.target;");
script.AppendLine ("\tif ((target == null) || (typeof(target) == \"undefined\")) target = event.srcElement;");
script.AppendLine ("\tif (event.keyCode == 13) {");
script.AppendLine ("\t\tif ((typeof(target) != \"undefined\") && (target != null)) {");
script.AppendLine ("\t\t\tif (typeof(target.onchange) != \"undefined\") {");
script.AppendLine ("\t\t\t\ttarget.onchange();");
script.AppendLine ("\t\t\t\tevent.cancelBubble = true;");
script.AppendLine ("\t\t\t\tif (event.stopPropagation) event.stopPropagation();");
script.AppendLine ("\t\t\t\treturn false;");
script.AppendLine ("\t\t\t}");
script.AppendLine ("\t\t}");
script.AppendLine ("\t}");
script.AppendLine ("\treturn true;");
script.AppendLine ("}");
Page.ClientScript.RegisterClientScriptBlock (typeof (TextBox), "KeyHandler", script.ToString(), true);
}
}
#endif
