js checkbox演示

< html >

    < head >

       < meta http-equiv = "Content-Type" content = "text/html; charset=gb2312" />

       < title ></ title >

       < script type = "text/javascript" >

function form_Attachment()

{

    var form_attachments= "" ;

   

    var list=document.getElementsByTagName( "input" );

    for ( var i=0;i<list.length;i++)

    {

       if (list[i].type== "checkbox" )

       {

           if (list[i].checked== false )

           {

              form_attachments+=list[i].value+ "," ;

           }

       }

 

    }

    var sequnce_id=form_attachments.substring(0,form_attachments.length-1);

    document.getElementById( "sequence" ).value=sequnce_id;

 

}

</ script >

    </ head >

    < body >

       < form id = "form1" name = "form1" method = "post" >

           < p >

              < input type = "text" id = "sequence" name = "sequence" />

              < input type = "checkbox" name = "checkbox" value = "1" />

              < input type = "checkbox" name = "checkbox" value = "2" />

              < input name = "checkbox" type = "checkbox" value = "3" />

              < input type = "checkbox" name = "checkbox" value = "4" />

              < input type = "checkbox" name = "checkbox" value = "5" />

              < input type = "checkbox" name = "checkbox" value = "6" />

           </ p >

           < input type = "button" name = "Submit" value = " 提交 "

              onclick = "form_Attachment();" />

           </ p >

       </ form >

    </ body >

</ html >