function xx(){
var elms = document.getElementsByTagName('input');
for(var i = 0; i < elms.length; i ++){
emls[i].disabled = true;
emls[i].setAttribute('disabled','true');
}}
var elms = document.getElementsByTagName('input');
for(var i = 0; i < elms.length; i ++){
emls[i].disabled = true;
emls[i].setAttribute('disabled','true');
}}
var wc = document.getElementsByTagName("input");
for (var i = 0 ; i < wc.length ; i ++) wc[i].readonly = true;
};
var elms = document.getElementsByTagName('input');
for(var i = 0; i < elms.length; i ++){
if(elms.type=='text')
{
emls[i].disabled = true;
emls[i].setAttribute('disabled','true');
}
}
}
for(i = 0 ;i< input.length;i++)
{
input[i].disabled = "disabled" ;
}
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<SCRIPT LANGUAGE="JavaScript">
<!--
function xx(){
var elms = document.getElementsByTagName('input');
for(var i = 0; i < elms.length; i ++){ if(elms[i].type=='text' || elms[i].type=="checkbox")
{
elms[i].disabled = true;
elms[i].setAttribute('disabled','true');
}
}
}
//-->
</SCRIPT>
</HEAD> <BODY>
<input type="button" onclick="xx();">
<input type="text">
<INPUT TYPE="checkbox" NAME="">
</BODY>
</HTML>被误导了....=.=