var isIPHONE = navigator.userAgent.toUpperCase().indexOf("IPHONE")!= -1;if(isIPHONE){ // 元素失去焦點隱藏iphone的軟鍵盤 function objBlur(obj,time){  var startTime=0,endTime=0,  time = !time?30:time,  docTouchend = function(event){   endTime = new Date().getTime();   if(event.target!= obj && (endTime - startTime <300)){    setTimeout(function(){     obj.blur();     document.removeEventListener("touchend", docTouchend,false);    },time);   }  };  document.addEventListener("touchstart",function(){   startTime = new Date().getTime();  });  document.addEventListener("touchend", docTouchend,false); } $("input").on("focus",function(){  var id = this.id;  var self = this;  var H = window.innerHeight;  var pos = getPosition(self);  if(isIPHONE){   var input = new objBlur(self);   input=null;  } }); function getPosition(target) {  var left = 0, top = 0;  do {   left += target.offsetLeft || 0;   top += target.offsetTop || 0;   target = target.offsetParent;  } while(target);  return {   left: left,   top: top  }; }}