console 命令行工具 X clear

console

window.onload=function(){

    var oBtn1=document.getElementById("btn1");
    oBtn1.onclick=function(){
    alert("欢迎您");
    }
    var oDivBtn=document.getElementById("divBtn");
    oDivBtn.onclick=function(){
    alert("我不是一个按钮");
    }
 var oPContent=document.getElementById("content");
    oPContent.onmouseover=function(){
    this.style.color="red";
    }
     oPContent.onmouseout=function(){
     this.style.color="black";
    }
     var oUpDownBtn=document.getElementById("updown");
     oUpDownBtn.onmousedown=function(){
     oPContent.style.color="blue";
    }
     oUpDownBtn.onmouseup=function(){
     oPContent.style.color="black";
    }
    var oString=document.getElementById("string");
    var oLength=document.getElementById("length");
    oString.onkeyup=function(){
     var str=oString.value;
    oLength.innerHTML=str.length;
    }
    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 oSingleText=document.getElementById("singleText");
var oMultipleText=document.getElementById("multipleText");
oSingleText.onselect=function(){
    //alert(this.value);
}
oMultipleText.onselect=function(){
    alert(this.value);
}
oSingleText.onclick=function(){
    this.select();
}
//单选
var oFruits=document.getElementsByName("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;
        }
    }
}
//全选
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;
             }
         }
    }
//打开网站
var oLinkList=document.getElementById("linkList");
oLinkList.onchange=function(){
    var url=this.options[this.selectedIndex].value;
    window.open(url);
}
//禁止复制
document.body.oncopy=function(){
    return false;
}
//禁止选中
document.body.onselectstart=function(){
    return false;
}
//禁止右键菜单
document.oncontextmenu=function(){
    return false;
}




    
}
function alertMes(){
    alert("亲爱的同学");
}

<!DOCTYPE html> 
<html>
    <head>
        <meta charset="utf-8" />
        <title></title>
        <style type="text/css">
           
        </style>
         

        <script>
        </script>
       
    </head>
    <body>
        <button id="btn" onclick="alertMes()">弹出信息</button>
        </br>
         <button id="btn1">弹出欢迎信息</button>
          </br>
         <div id="divBtn">点我</div>
             </br>
              </br>
         <div>
             <p id="content">广州新华学院</p>
             <button id="updown">按下松开</button>
        <br/>
             <br/>
                  <br/>
        <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 />
        <br />
        <br /> 
        <div>
            <input id="search" type="text" value="百度一下，你就知道"></input>
            <button>搜索</button>
        </div>
      <br />
        <br />


         <div>
            <input id="singleText" type="text" value="我是单行文本框"></input>
            <br />
            <textarea id="multipleText" cols="20" row="6">我是多行文本框，可以输入很多行</textarea>
        </div>
         <br />
          <br />
          <br />
        <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;
}