console 命令行工具 X clear

console

window.onload = function(){
    var oBtn = document.getElementById("btn");
    oBtn.onclick=function(){
          alert("欢迎您！");
    }
 
    var oBtn = document.getElementById("divBtn");
    oBtn.onclick=function(){
          alert("我不是按钮！");
    }

    var oDivContent=document.getElementById("content");
    oDivContent.onmouseover=function(){
        this.style.color = "red";
    }
    oDivContent.onmouseout=function(){
        this.style.color = "black";
    }
     var oUpdownBtn = document.getElementById("updown");
    oUpdownBtn.onmousedown=function(){
          oDivContent.style.color="blue";
    }
    oUpdownBtn.onmouseup=function(){
          oDivContent.style.color="black";
    }
    oUpdownBtn.onmousemove=function(){
        this.style.backgroundColor="lightskyblue";
    }


    var oString = document.getElementById("string");
    var oLength = document.getElementById("length");
    oString.onkeyup=function(){
        var str = oString.value;
        oLength.innerHTML=str.length;
    }
    oString.focus();


    var oNumber = document.getElementById("number");
    var oHint = document.getElementById("hint");
    oNumber.onkeyup=function(){
        var regex =/^[0-9]*$/;

        if (regex.test(oNumber.value)){
            oHint.innerHTML="输入正确";
            oHint.style.color="green";
        }
        else{
            oHint.innerHTML="必须输入数字";
            oHint.style.color="red";  
        }
    }

    var oSearch=document.getElementById("search");
    oSearch.onfocus=function(){
        if(this.value == "百度一下，你就知道"){
            this.value = "";
        }
    }
    oSearch.onblur=function(){
        if(this.value == ""){
            this.value = "百度一下，你就知道";
        }
    }

    var oSingleText=document.getElementById("singleText");
    var oMultipleText=document.getElementById("MultipleText");

    oSingleText.onselect=function(){
       // alert(this.value);
    }
    
    oSingleText.onclick=function(){
        this.select();
    }

    oMultipleText.onselect=function(){
        alert(this.value);
    }
    
    var oFruits=document.getElementById("fruit");
    var oPFruit=document.getElementById("fruitchosen");
     for (var i = 0; i < oFruits.length; ++i) {
        oFruits[i].onchange = function () {
            if(this.checked) {
                oPFruit.innerHTML="你的选择是："+this.value;
            }
        }
    } 

    var oSelectAll=document.getElementById("selectAll");
    var oFruits1=document.getElementsByName("fruit1");

    oSelectAll.onchange=function(){
        if(this.checked){
            for(var i=0;i<oFruits1.length;++i){
                oFruits1[i].checked=true;
            }

        }
        else{
             for(var i=0;i<oFruits1.length;++i){
             oFruits1[i].checked=false;
            }
        }
    }
        var oLinkList = document.getElementById("linkList");
    oLinkList.onchange=function(){
        var link=this.options[this.selectedIndex].value;
        window.open(link);
    }
}

function alertMes(){
    alert("新华学院");
}

<!DOCTYPE html> 
<html>
    <head>
        <meta charset="utf-8" />
        <title></title>
        <style type="text/css">
            
        </style>
        <script>
        </script>
    </head>
    <body>
        <button onclick="alertMes()">弹出信息</button>
        <br/>
        <br/>
        <button id="btn">弹出欢迎信息</button>
        <br/>
        <br/>
        <div id="divBtn">点我</div>
        <br/>
        <br/>
        <div id="content">广州新华学院
            <br/>
            <br/>
            <button id="updown">按下松开</button>
        </div>
        <div>
            <label>输入任意字符：</label>
            <input type="text" id="string"></input>
            <br />
            <label>字符串长度为：</label>
            <span id="length">0</span>
        </div> 
         <br/>
    <div>
        <label>输入数字：</label>
        <input type="text" id="number"></input>
        <br/>
        <div id="hint"></div>
    </div>


    <br/> 
    <div>
    <input id="search" type="text" value="百度一下，你就知道"></input>
    <button>搜索</button>
    </div>
    <div>
        <input id="singleText" type="text" value="我是单行文本框"></input>
        <textarea id="multipleText" cols="20" row="6">我是多行文本框，可以输很多行</textarea>
    </div>
    <div>
            <label><input type="radio" name="fruit" value="苹果"></input>苹果</label>
            <label><input type="radio" name="fruit" value="香蕉"></input>香蕉</label>
            <label><input type="radio" name="fruit" value="西瓜"></input>西瓜</label>
            <br />
            <p id="fruitchosen"></p>
    </div> 
    <div>
            <p><label><input id="selectAll" type="checkbox"></input>全选/反选：</label></p>
            <label><input type="checkbox" name="fruit1" value="苹果"></input>香蕉</label>
            <label><input type="checkbox" name="fruit1" value="香蕉"></input>西瓜</label>
            <label><input type="checkbox" name="fruit1" value="西瓜"></input>西瓜</label>
    </div> 

    <br />
        <select id="linkList">
            <option value="http://www.baidu.com">百度</option>
            <option value="http://www.sina.com.cn">新浪</option>
            <option value="http://www.qq.com">腾讯</option>
            <option value="http://www.sohu.com">搜狐</option>
        </select> 
    </body>
</html>

#divBtn {
    display: inline-block;
    width: 80px;
    height: 24px;
    line-height: 24px;
    font-family:微软雅黑;
    font-size:15px;
    text-align: center;
    border-radius: 3px;
    background-color: deepskyblue;
    color: White;
    cursor: pointer;
} 

#search{
    color:#bbbbbb;
}