/** Loading animation  *  Created by 黑と白の印記 on 15/03/11.  */   function loading(element,lightColor,darkColor,speed,callback){     if(!element&&(!element.innerText||!element.textContent))return     element = typeof element==="string"?document.getElementById(element):element     lightColor = lightColor||"#fff",darkColor = darkColor||"#000",speed = speed||300       var arr_spanEles = new Array()          !function(arr_elementText){         element.innerText=element.textContent=""         for(var i=0;i<arr_elementText.length;i++){             var span = document.createElement("span")             element.innerText?span.innerText = arr_elementText[i]:span.textContent = arr_elementText[i]             element.appendChild(span)             arr_spanEles.push(span)         }     }((element.innerText||element.textContent).split(""))       var index = -1,length = arr_spanEles.length     var loadingTimer = setInterval(function(){         arr_spanEles[Math.max(index,0)].style.color = darkColor         if(index == length-1){             index = -1             callback&&callback()         }         ++index         arr_spanEles[index].style.color = lightColor     },speed) }