在iframe里面提交表单详解编程语言

<iframe id="qrcode-iframe" name="submitIframe" src="about:blank" width="100%" height="750px" frameborder="no" border="0" marginwidth="0" marginheight="0"  >           			 
</iframe> 
<script> 
$(function() { 
var form = "<form id="alipaysubmit" name="alipaysubmit" action="https://mapi.alipay.com/gateway.do?_input_charset=utf-8" method="get" target="submitIfram"></form><script>document.forms['alipaysubmit'].submit();</script>"; 
$("#qrcode-iframe").append($(form)); 
}); 
</script>

指定表单的target为iframe的name即可