<form name=form1>
<input type = "button" name = "bt1" onclick = "doClick(this)">
</form><script>
function doClick(obj){
obj.disabled=true;
//或者
document.all.bt1.disabled=true;
}
</script>
</script>
<input type = "button" name = "bt1" onclick = "doClick(this)">
</form><script>
function doClick(obj){
obj.disabled=true;
//或者
document.all.bt1.disabled=true;
}
</script>
</script>
function doClick(){
document.all.bt1.disabled=true;}
</script>
<input type = "button" name = "bt1" onclick = "doClick();this.disabled">
</form>