diff --git a/WebContent/Frame/page/js/as_debug.js b/WebContent/Frame/page/js/as_debug.js
index d8c271a25..af5a4d984 100644
--- a/WebContent/Frame/page/js/as_debug.js
+++ b/WebContent/Frame/page/js/as_debug.js
@@ -225,7 +225,7 @@ function keydownAction(event){
 	}else if(event.keyCode==8){ // backspace
 		var target = $(event.target);
 		// 可以取到值、为可编辑的表单、不为按钮/下拉选择/勾选/只读等允许使用backspace键
-		return !!target.val() && target.is(":input:enabled") && !target.is(":button,:selected,:checked,[readonly]");
+		return target.val() && target.is(":input:enabled") && !target.is(":button,:selected,:checked,[readonly]");
 	}
 }
 $(document).keydown(keydownAction);
\ No newline at end of file