<!-- 调整select使居中   -->
<script type="text/javascript">
		$(function() {
			function getTextWidth(txt) {
				var $elm = $('<span class="tempforSize">' + txt + '</span>').prependTo("body");
				var elmWidth = $elm.width();
				$elm.remove();
				return elmWidth;
			}
			function centerSelect($elm) {
				var optionWidth = getTextWidth($elm.children(":selected").html())
				var emptySpace = $elm.width() - optionWidth;
				$elm.css("text-indent", (emptySpace / 2)); // -10 for some browers to remove the right toggle control width
			}
			// on start 
			console.log($('.weui-select'));
			$('.weui-select').each(function() {
				centerSelect($(this));
			});
			// on change
			$('.weui-select').on('change', function() {
				centerSelect($(this));
			});
		});
</script>

如果select是动态加载的,可以考虑加载完成再添加方法,或者用选择器的方式添加change方法:

  $(".yj_myform").on("change",".weui-select",function(){
			 centerSelect($(this));
	});