select 下拉框另類寫法的好處

 

<select name="card_shop_id"  onchange="changeCardshop(this.value);" >

function changeCardshop(v){
    var url="card_explain_new.php?card_id=<?php echo passport_encrypt($card_id); ?>&card_shop_id="+v;
			   //alert(url);
	document.location = url;
}

這樣寫,即使頁面刷新了,也還會有選中的效果