js函数集合大全1
4.格式化字符串变量 <script>str1="peace,happiness and prosperity.<br>"document.write(str1)document.write(str1.big())document.write(str1.small())document.write(str1.bold())document.write(str1.italics())document.write(str1.strike())document.write(str1.fontsize(6))document.write(str1.fontcolor(green))</script> 5.创建锚和链接 <script>str1="this is the bigginning of the page.<br>"str2="….<br>"str3="this is the end of the page .<br>"str4="link to the start<br>"str5="link to the end<br>"document.write(str1.anchor("start"))for(i=0;i<10;i++)document.write(str2);document.write(str3.anchor("end"))document.write(str4.link("#start"))document.write(str5.link("#end"))</script> 6.确定字符串长度 <script>str1="this is the bigginning of the page."document.write(str1+"<br>")document.write( "字符串的长度是:"+str1.length)document.write("字符串全部大写是;"+str1.toUpperCase())document.write("字符串全部小写是;"+str1.toLowerCase())</script> 7.在字符串内搜索 <script>str1="this is the end of the line.<br>"document.write(str1)document.write("字符end在字符串的位置是"+str1.search("end"))document.write("字符dog在字符串的位置是"+str1.search("dog"))</script> 8.定位字符串中的字符 <script>str1="spring is a time for flowers and trees and baby bunnles<br>"document.write(str1)document.write("the index for the second word ‘and' is"+str1.indexOf("and",30))documednt.write("the last index of the word ‘and' is "+str1.lastIndexOf("and"))</script> 9.替换字符串中的文本 <script>str1="spring is a time for flowers and trees and baby bunnles<br>"document.write(str1)document .write(str1.replace("and",","))</script> 10.字符串分离 <script>str1="spring is a time for flowers and trees and baby bunnles<br>"document.write(str1)str1array=str1.split(" ")document.write(str1array+"<br>")document.write(str1array+"<br>")document.write(str1array+"<br>")document.write(str1array+"<br>")</script> 第十章 使用日期和时间 1.使用Date对象 <script>cdate=new Date("august 2,1989 12:30:00")document.write(cdate)</script> 2.显示当地时间和日期 <script>cdate=new Date()document.write("当前时间是:"+cdate.toGMTString()+"<br>")document.write("日期和时间是:"+cdate.toLocaleString())</script> 3.获得时间和日期值 <script>cdate=new Date()document.write("显示当前的星期"+cdate.getDay()+"<br>")document.write("显示当前的月份"+cdate.getMonth()+"<br>")document.write("显示当前的日期"+cdate.getDay()+"<br>")document.write("显示当前的年份"+cdate.getYear()+"<br>")document.write("显示当前的小时"+cdate.getHours()+"<br>")document.write("显示当前的分钟"+cdate.getMinutes()+"<br>")document.write("显示当前的秒"+cdate.getSeconds()+"<br>")</script> 4.设置时间和日期值 <script language=javascript>cdate=new Date("December 25,1984")document.write("显示日期"+cdate+"<br>")document.write("设置月份"+cdate.setMonth(10)+"<br>")document.write("设置日期"+cdate.setDate(23)+"<br>")document.write("设置年份"+cdate.setYear(2000)+"<br>")document.write("设置小时"+cdate.setHours(13)+"<br>");document.write("设置分钟"+cdate.setMinutes(47)+"<br>");document.write("设置秒"+cdate.setSeconds(23)+"<br>");document.write("显示设置后的日期和时间"+cdate);</script> 第十一章 使用Math对象 1. 使用Math对象 <script language=javascript></script><form name=form1>圆的半径:<input type=text name=rad><br>圆的面积:<input type=text name=area><br><input type=button name=button1 value=计算圆的面积 onclick=document.form1.area.value=document.form1.rad.value*document.form1.rad.value*Math.PI></form> 2.生成随机数 <script>array1=new Array("这是第1句","这是第2句","这是第3句","这是第4句","这是第5句","这是第6句")RandomNo=Math.floor(array1.length*Math.random())document.write("随机输出某一句"+"<br>"+array1)</script> 3.使用平方根 <form name=form1>value:<input type=text name=va1><br>平方根<input type=text name=sqrt><br><input type=button name=button1 value=计算平方根></form> 4.数字的舍入 <form name=form1>输入<input type=text name=val><br>舍入的结果<input type=text name=round><br><input type=button name=button1 value=计算结果 onclick=document.form1.round.value=Math.round(document.form1.val.value)></form> 5.乘方运算 <form name=form1>底数<input type=text name=val><br>指数<input type=text name=power><br>幂<input type=text name=result><br><input type=button name=button1 value=计算结果 ></form> 6.发现最小值和最大值 <form name=form1>数字1<input type=text name=val1><br>数字2<input type=text name=val2><br>最小值<input type=text name=min><br>最大值<input type=text name=max><br>数字1<input type=button value=计算 ></form> 第十二章 使用表单 1.使用文本框 <form name=form1><input type=text value="information ,please"name=text1></form><script>document.write("表单text1类型是: "+document.form1.text1.type+"<br>")document.write("表单text1名称是: "+document.form1.text1.name+"<br>")document.write("表单text1值是: "+document.form1.text1.value+"<br>")document.write("表单text1大小是: "+document.form1.text1.size+"<br>")</script> <form name=form1><input type=text name=text1 value=click hereonfocus=document.form1.text1.select()></form> 2.使用密码框 <form name=form1><input type=password name=pw1 value=daylight></form><script>document.write("表单pw1的类型:"+document.form1.pw1.type+"<br>")document.write("表单pw1的名称:"+document.form1.pw1.name+"<br>")document.write("表单pw1的值:"+document.form1.pw1.value+"<br>")document.write("表单pw1的大小:"+document.form1.pw1.size+"<br>")</script> 3.使用隐藏字段 <form name=form1><input type=hidden name=hid1 value=piece of eight></form><script>document.write("表单hid1的类型:"+document.form1.hid1.type+"<br>")document.write("表单hid1的名称:"+document.form1.hid1.name+"<br>")document.write("表单hid1的值:"+document.form1.hid1.value+"<br>")</script> 4.使用文本区域框 <form name=form1><textarea name=ta1>how many grains of sand are there in the sahara desert?</textarea></form><script>document.write("表单ta1的类型:"+document.form1.ta1.type+"<br>")document.write("表单ta1的名称:"+document.form1.ta1.name+"<br>")document.write("表单ta1的值:"+document.form1.ta1.value+"<br>")document.write("表单ta1的横向宽度:"+document.form1.ta1.cols+"<br>")document.write("表单ta1的纵向宽度:"+document.form1.rows.value+"<br>")</script> 6.使用重置按钮 <form name=form1><input type=reset name=reset1 value="rest form"></form><script>document.write("表单reset1的类型:"+document.form1.reset1.type+"<br>")document.write("表单reset1的名称:"+document.form1.reset1.name+"<br>")document.write("表单reset1的值:"+document.form1.reset1.value+"<br>")</script> 7.使用提交按钮 <form name=form1><input type=submit name=submit1 value="submit form"></form><script>document.write("表单submit1的类型:"+document.form1.submit1.type+"<br>")document.write("表单submit1的名称:"+document.form1.submit1.name+"<br>")document.write("表单submit1的值:"+document.form1.submit1.value+"<br>")</script> 8.使用复选按钮 <form name=form1><input type=checkbox name=cb1 >computer savvy?</form><script>document.write("表单cb1的类型:"+document.form1.cb1.type+"<br>")document.write("表单cb1是否被选择?:"+document.form1.cb1.checked+"<br>")document.write("表单cb1的名称:"+document.form1.cb1.name+"<br>")</script> 9.使用单选按钮 <form name=form1><input type=radio name=radio1>male<input type=radio name=radio1>female</form><script>document.write("第一个按钮被选择"+document.form1.radio1.checked+"<br>")document.write("第二个按钮被选择"+document.form1.radio1.checked+"<br>")document.write("按钮的名称"+ document.form1.radio1.name+"<br>")document.write("按钮的个数"+document.form1.radio1.length)</script> 10.使用选择列表 <form name=form1><select name=select1 size=4><option name=option1 value=lon>london,England</option><option name=option2 value=dub>Dublin,Ireland</option></select></form><script>document.write("这个选择列表的名称"+document.form1.select1.name+"<br>")document.write("这个选择列表的长度"+document.form1.select1.length+"<br>")document.write("这个选择列表当前被选择的索引号"+document.form1.select1.selectedIndex+"<br>")document.write("这个选择列表的尺寸"+document.form1.select1.size+"<br>")</script> 11.验证表单的有效性 <script>function validate(){if(document.form1.text1.value!='1'||'2'||'3'||'4'){alert("请输入1~4的整数")}}</script><form name=form1>请输入1~4的整数:<input type=text name=text1 size=4 onchange=validate()></form> 12.控制表单焦点 <form name=form1><input type=text name=text1 value=where is you focus?><br><input type=text name=text2 value=is there?><br><input type=text name=text3 value=or maybe here?><br><input type=button name=button1 value="text box #1" onclick=document.form1.text1.focus()><br><input type=button name=button2 value="text box #2" onclick=document.form1.text2.focus()><br><input type=button name=button3 value="text box #3" onclick=document.form1.text3.focus()><br></form> 第十三章 使用分栏 第十四章 使用navigator 1.使用navigator对象 <script>document.write("navigator对象的属性"+"<br>")document.write("appcodename:"+navigator.appCodeName+"<br>")document.write("appname::"+navigator.appName+"<br>")document.write("appversion:"+navigator.appVersion+"<br>")document.write("platform:"+navigator.platform+"<br>")document.write("userAgent:"+navigator.userAgent+"<br>")</script><script>document.write("navigator对象的方法"+"<br>")document.write("javaEnabled():"+navigator.javaEnabled())</script> 2.检查用户的浏览器 <script>if(navigator.appName.indexOf("Microsoft")!=-1){document.write("用户浏览器是微软的IE浏览器"+"<br>")}else if(navigator.appName.indexOf("Netscape")!=-1){document.write("用户浏览器是netscape的netscape浏览器"+"<br>")}if(navigator.appVersion.indexOf("4.0")!=-1){document.write("you are using a version 4.0compatible browser")}else{document.write("this browser is not 4.0 compliant")}</script> 3.检测用户的操作系统 <script>if (navigator.platform.indexOf("win32")!=-1){document.write("you are using a computer running windows 95 or highter")}else{document.write("this computer is not running windows 95 or higher")}</script> 4.使用location对象 <script>document.write("location对象的属性"+"<br>")document.write("hash"+location.hash+"<br>")document.write("hostname"+location.hostname+"<br>")document.write("host"+location.host+"<br>")document.write("href"+location.href+"<br>")document.write("port"+location.port+"<br>")document.write("search"+location.search+"<br>")</script> 重新加载网页<form name=form1><input type=button name=button1 value=重新加载本页 onclick=location.reload></form> 5.使用cookie <script>finction makecookie(){if(!document.cookie){name=prompt("请输入你的姓名");document.cookie="name="+name+";";}}</script> <body onload=makecookie()><script>function makecookie(){if(!document.cookie){name=prompt("请输入你的姓名")document.cookie="name="+name+";";namestart=document.cookie.indexOf("=");nameend=document.cookieindexOf(";");document.writeln("your name is:" +document.cookie.substring(namestart+1,nameend)+",br>")}}</script>
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