var data = "<input type=text size=4 name=productName3 />";
找到里面的数字3,替换成任意的数字比如说换成4var data = "<input type=text size=4 name=productName4 />";
找到里面的数字3,替换成任意的数字比如说换成4var data = "<input type=text size=4 name=productName4 />";
var data = "<input type=text size=4 name=productName3 />";
var r = /\d/g;
data = data.replace(r, '4');
alert(data)
var data = "<input type=text size=4 name=productName3 />";
var r = /name=([^\s]+)(\d+)/;
data = data.replace(r, 'name=$14');
alert(data)试试