Some print.
Some print.
~SingleForum~无废话记录~ + ~19~记录点有用的好吗？少说废话少装b~

~SingleForum~无废话记录~ » js

JS判断函数变量是否存在

Started 2 years ago by admin. | Tags: .

函数

PLAIN TEXT
JAVASCRIPT:
  1. try
  2. {
  3. if(typeof(eval(funcName))=="function")
  4. {
  5. funcName();
  6. }
  7. }catch(e)
  8. {
  9. //alert("not function");
  10. }

变量

PLAIN TEXT
JAVASCRIPT:
  1. function check()
  2. {
  3. if (typeof(myvalue)=="undefined")
  4. {
  5. alert("value is undefined");
  6. }
  7. else
  8. {
  9. alert("value is true");
  10. }
  11. }

RSS feed for this topic