js用到的一些工具方法

来源：互联网发布：design center 软件编辑：程序博客网时间：2024/04/29 18:19

1、订单页面用到的加减算出价格的方法：

/** * 用于计算订单的总费用 */

// 总金额var totalFee = 0;function sum(type, flg){    var count = $("#"+type+" input#count").val();    var newcount = parseInt(count)+1;    if('+'==flg){        $("#"+type+" input#count").attr("value",parseInt(count)+1);    }else if(parseInt(count)>0){        $("#"+type+" input#count").attr("value",parseInt(count)-1);    }    totalMoney(type);};function totalMoney(type){    //alert("计算："+ count);    var count = $("#jianzhi input#count").val();    var totalFee1 = 30 * parseInt(count);    count = $("#quanzhi input#count").val();    var totalFee2 =  80 * parseInt(count);    count = $("#duanqi input#count").val();    var totalFee3 =  50 * parseInt(count);    totalFee = totalFee1+totalFee2+totalFee3;    $("#totalSpan").html(totalFee);}

对应的HTML代码：

<div class="jiage">    <div class="xiangqing clearfix">        <div class="container" id="jianzhi">            <p class="zhiwei">XXXXXXX<span class="sl"><input type="button" value="-" class="jian" onclick="sum('jianzhi','-')">      <input type="text"  value="0" class="shuliang" id="count" readonly="readonly">      <input type="button"  value="+" class="jia" onclick="sum('jianzhi','+')"></span></p>            <p class="price">￥<span id="fee">30</span></p>        </div>    </div>    <div class="xiangqing clearfix">        <div class="container" id="quanzhi">            <p class="zhiwei">XXXXXXX<span class="sl"><input type="button" value="-" class="jian" onclick="sum('quanzhi','-')">      <input type="text"  value="0" class="shuliang" id="count" readonly="readonly">      <input type="button"  value="+" class="jia" onclick="sum('quanzhi','+')"></span></p>            <p class="price">￥<span id="fee">80</span></p>        </div>    </div>    <div class="xiangqing clearfix">        <div class="container" id="duanqi">            <p class="zhiwei">XXXXXXX<span class="sl"><input type="button" value="-" class="jian" onclick="sum('duanqi','-')">      <input type="text"  value="0" class="shuliang" id="count" readonly="readonly">      <input type="button"  value="+" class="jia" onclick="sum('duanqi','+')"></span></p>            <p class="price">￥<span id="fee">50</span></p>        </div>    </div></div>
2、动态改变表单的placeholder属性值：
/** * 取两个数较小 */function numCompare(num1, num2) {    if(parseInt(num1) > parseInt(num2)){        return num2;    }else {        return num1;    }}
/** * 计算提现上限 */$(function() {    var inp = $('#money');    // 用户能提取的最大值    var num = 800;    if(parseInt(num)>500){        num = 500;    }else{        num = parseInt(num);    }    var text = '最高提现'+num+'元';    inp.focus(function() {        $(this).attr('placeholder', text);    })});
对应的HTML代码：
<div class="weui_cell">    <div class="weui_cell_hd">        <label class="weui_label">金额</label>    </div>    <div class="weui_cell_bd weui_cell_primary">        <input class="weui_input" type="number" pattern="[0-9]*"               placeholder="请输入提现金额" id="money" name="money" />    </div></div>
3、js中数组中是否存在某个值：
var num1 = $('#money').val();// 判断用户提现的金额是不是符合系统提现条件var arr = [100,200,300,400,500];if(arr.indexOf(num1) == -1){    alert("请输入符合上述说明的额度");    return;}
4、js验证邮箱、手机、QQ号码
<body><input id="test" type="text" name="name" value="" /><input id="test2" type="text2" name="name" value="" /><input id="test3" type="text2" name="name" value="" /><input type="checkbox" name="vehicle" value="Car" /></body><script type="text/javascript">// QQ验证$("#test3").blur(function() {var phone = document.getElementById('test3').value;if(!(/^\d{5,10}$/.test(phone))) {alert("QQ有误，请重填");return false;}});// 邮箱验证$("#test2").blur(function() {var phone = document.getElementById('test2').value;if(!(/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/.test(phone))) {alert("邮箱有误，请重填");return false;}});// 验证手机$("#test").blur(function() {var phone = document.getElementById('test').value;if(!(/^1[3|4|5|7|8]\d{9}$/.test(phone))) {alert("手机号码有误，请重填");//document.getElementById('test').focus();$("#test").onfocus();return false;}});</script>
// 网址验证
$("#test4").blur(function() {
var str = document.getElementById('test4').value;
alert(str);
var regUrl = /(http\:\/\/)?([\w.]+)(\/[\w- \.\/\?%&=]*)?/gi;
var result = str.match(regUrl);
if(result != null) {
alert("Yes ")
} else {
alert("No! ")
}
});
// 验证密码$("#test5").blur(function() {var str = document.getElementById('test5').value;var patrn = /^(\w){6,20}$/;if(!patrn.exec(str)){alert("no")}else{alert("yes")}});
两个比引入js,css的方便方法：
1.在eclipse中直接把js文件拖到html里，之后去掉与本文件共同的路径名，上一级是../;可以这样尝试；还可以Ctrl之后放鼠标能跳过去，就是正确引入了。
select下拉框改变触发方法：
<select onchange="jumpNetData('webBlog', this.value)"  class="xc-quanxian-text" style="width:160px;height:32px;font-size:14px;"><option value="XXXXXX">XXXXXXXXX</option></select>
返回到上一个页面
<input type="button" onclick="history.go(-1)" value="取消"/>

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