<pre name="code" class="javascript">function resetItem(){
	var wWidth = $(window).width();
	var wHeight=$(window).height();
	var sTop = $(document).scrollTop();
	var sLeft = $(document).scrollLeft();	
	if(IsPC()){
  	}
}

function IsPC() {
    var userAgentInfo = navigator.userAgent;
    var Agents = ["Android", "iPhone",
                "SymbianOS", "Windows Phone",
                "iPad", "iPod"];
    var flag = true;
    for (var v = 0; v < Agents.length; v++) {
        if (userAgentInfo.indexOf(Agents[v]) > 0) {
            flag = false;
            break;
        }
    }
    return flag;
}
function isIe(){return ("ActiveXObject" in window);}
function getIeVersion() {
    var browser = navigator.appName;
    var b_version = navigator.appVersion;
    var version = b_version.split(";");
    if (version.length > 1) {
       var trim_Version = parseInt(version[1].replace(/[ ]/g, "").replace(/MSIE/g, ""));
       if (trim_Version < 9) {
         return false;
       }
    }
    return true;
}

$(document).ready(function(){resetItem();$(window).resize(resetItem);$(window).scroll(resetItem); })；
 

說明

1.判斷瀏覽器

①判斷是否為ie瀏覽器

function isIe(){return ("ActiveXObject" in window);}

②判斷ie的版本[此處判斷是否為ie9及以上瀏覽器版本]

function getIeVersion() {
    var browser = navigator.appName;
    var b_version = navigator.appVersion;
    var version = b_version.split(";");
    if (version.length > 1) {
       var trim_Version = parseInt(version[1].replace(/[ ]/g, "").replace(/MSIE/g, ""));
       if (trim_Version < 9) {
         return false;
       }
    }
    return true;
}
 

2.獲取頁面資訊（寬高等）

①頁面可視區域高度：

var wHeight=$(window).height();<pre name="code" class="javascript">var wWidth = $(window).width();

②當前滾動的位移

var sTop = $(document).scrollTop();
var sLeft = $(document).scrollLeft();

3.當頁面發生變化時呼叫函式reset()

$(window).resize(reset);//視窗大小發生變化時
$(window).scroll(reset);//滾動時

4.判斷手機還是電腦

function IsPC() {
    var userAgentInfo = navigator.userAgent;
    var Agents = ["Android", "iPhone",
                "SymbianOS", "Windows Phone",
                "iPad", "iPod"];
    var flag = true;
    for (var v = 0; v < Agents.length; v++) {
        if (userAgentInfo.indexOf(Agents[v]) > 0) {
            flag = false;
            break;
        }
    }
    return flag;
}