好久没写JS了

来源：互联网发布：大数据运维工程师待遇编辑：程序博客网时间：2024/04/28 18:21

由于一直做产品，都快一年没做新功能了，一直在做性能优化，很多东东好像都忘得差不多，前两天写JS时，居然好多东西都忘了，

1, 取一个HTML控件的值，从前台取$（‘controlName’）.value,从后台取Request["controlID"].Trim().

2.对TEXT控件输入值的控制： onkeypress="if (event.keyCode<48 || event.keyCode>57) event.returnValue = false;"

3.对selectionbox的操作，var i = sel.options.length; sel.options[i],

a. add a item in selectionbox:to.options[to.options.length] = new Option(o.text, o.value, false, false);

b. sel.options[i].selected = true/false;

4.Regular expression:

a. accept_char = /^[/x20/x2d-/x2e/x30-/x39/x40/x41-/x5a/x5c/x5f/x61-/x7a]+$/; //

b.email_accept_char = /^[/x20/x26/x27/x2d-/x39/x40-/x5d/x5f/x61-/x7a]+$/; //Email char accepted

c. phone_char = /^[/x20/x23/x2a/x2d/x30-/x39/x41-/x5a/x5f/x61-/x7a]+$/; //Phone char accepted

d.not_accept_char = /[/x21-/x2c/x2e/x3a-/x3e/x40/x5b-/x5e/x60/x7b-/x7e]+/;

5. emial_accept_char.test(controlName.value)

6.Email format: form.txtEmail.value.indexof("@") != -1

7.selectAllOptions(from);
   if (arguments.length==2)
   {
    moveSelectedOptions(from,to);
   }
   else if (arguments.length==3)
   {
    moveSelectedOptions(from,to,arguments[2]);
   }
   else if (arguments.length==4)
   {
    moveSelectedOptions(from,to,arguments[2],arguments[3]);
   }