<input type=button id=bt_ok >
<script >
function bt_visiable(){
if(int a=0;a<3;a++){
bt_ok.visiable=true;
else{
bt_ok.visiable=false;
}
</script>
<script >
function bt_visiable(){
if(int a=0;a<3;a++){
bt_ok.visiable=true;
else{
bt_ok.visiable=false;
}
</script>
<form name="form1">
<input type=button id=bt_ok onclick=bt_display() value="o k">
<script>
function bt_display()
{
if (document.form1.bt_ok.disabled==false)
{
document.form1.bt_ok.disabled=true;
// form1.submit(); //用于提交表单
}
}
</script>
</form>
二:
<input type=button id=bt_ok value="o k" onclick="bt_ok.style.display=(bt_ok.style.display=='none')?'':'none';">