console 命令行工具 X clear

console

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

//鼠标移动过来变颜色（广州新华学院）
    var oPContent=document.getElementById("content");
    oPContent.onmouseover=function(){
        this.style.color="red";
    }
    oPContent.onmouseout=function(){
        this.style.color="black";
    }
    //按下松开颜色变换
    var oUpdownBtn=document.getElementById("updown");
    oUpdownBtn.onmousedown=function(){
        oPContent.style.color="blue";
    }
    oUpdownBtn.onmouseup=function(){
        oPContent.style.color="black";
    }
    oUpdownBtn.onmousemove=function(){
        this.style.backgroundColor="lightskyblue";
    }
//输入任意字符
    var oString=document.getElementById("string");
    var oLength=document.getElementById("length");
    oString.onkeyup=function(){
        var str=oString.value;
        oLength.innerHTML=str.length;
    }
    //oString.focus();
//输入数字
    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";
        }
    }

    //获取焦点
    var oSearch=document.getElementById("search");
    oSearch.onfocus=function(){
        if(this.value=="百度一下，你就知道"){
            this.value="";
            this.style.color="black";
        }
    }
    oSearch.onblur=function(){
        if(this.value==""){
            this.value="百度一下，你就知道"
            this.style.color="#bbbbbb";
        }
    }

    //单行文本和多行文本的选中事件
    var oSingleText=document.getElementById("singleText");
    var oMultipleText=document.getElementById("multipText");

    oSingleText.onselect=function(){
        //alert(this.value);
    }
    oSingleText.onclick=function(){
        this.select();
    }
    /*oMultipleText.onselect=function(){
        alert(this.value);
    }*/
    //具有多个选项的表单元素的值发射改变的事件
    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;
            }
        }
    }

    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;
            }
        }
    }
//下拉列表
    var oLinkList=document.getElementById("linkList");
    oLinkList.onchange=function(){
        var link=this.options[this.selectedIndex].value;
        window.open(link);
    }

     // 防止页面内容被复制
    document.body.oncopy = function(){
        return false;
    }

    // 防止页面内容被选取
    document.body.onselectstart = function() {
        return false;
    }

    // 禁止使用鼠标右键
    document.oncontextmenu =function() {
        return false;
    } 
} 

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/>
        <button id="divBtn">点我</button>
        <br/>
        <br/>
        <div>
            <p id="content">广州新华学院</p>
            <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/>
        <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/> 
        <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;
}