臭大佬

$("#myform input,#myform textarea").each(function(){
    this.value = this.value.replace(/\&/g,"%26");//也可以清空数据this.value ="";
})
$("#myform").find("input,textarea").each(function(){
   this.value = this.value.replace(/\&/g,"%26");//也可以清空数据this.value ="";
});