HTML simple shopping quantity applet

HTML simple shopping quantity applet

This article shares a simple HTML shopping quantity applet for your reference. The specific content is as follows

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  1. < html >   
  2.     < head >   
  3.   
  4.        < title > Shopping quantity applet </ title >   
  5.   
  6.      < script >   
  7. function sub()
  8. {
  9.   
  10. var a = buy.ans.value ;
  11. //alert(a);
  12.              a = parseInt (a);
  13. a--;
  14. if(a < 0 )
  15.               a = 0 ;
  16.              buy.ans.value = a;
  17. }
  18. function add()
  19. {
  20. var a = buy.ans.value ;
  21.              a = parseInt (a);
  22. a++;
  23.              buy.ans.value = a;
  24. }
  25.          </ script >   
  26.   
  27.     </ head >   
  28.   
  29.     < body >   
  30.       < form   name = "buy" >   
  31. Purchase quantity < input   type = "button"    value = "-"   onclick = "sub()" >   
  32.              < input   type = "text"   name = "ans"   value = "1" >   
  33.              < input   type = "button"    value = "+"   onclick = "add()" >   
  34.   
  35.       </ form >   
  36.      </ body >   
  37. </ html >   
  38.   

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

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