js 判斷 checked 是否選中 js 删除指定字元串 ，js 截取指定位圖的字元串

<script type="text/javascript">

$(document).ready(function(){

$(".sendspaccount").click(function(){

var tval = $('#sendaccount').val();

if($(this).is(':checked'))

{

if(tval.length < 1)

{

$('#sendaccount').val($(this).val());

}else{

$('#sendaccount').val(tval+','+$(this).val());

}

}else{

var fixtval = tval.replace(','+$(this).val(),"");

fixtval = fixtval.replace($(this).val(),"");

if(fixtval.substring(0,1) == ',') fixtval = fixtval.substr(1)

$('#sendaccount').val(fixtval);

}

})

});

</script>