如果事件是在特定条件下触发的行为，那么函数就是实现特定功能的行为的具体的体现。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>event对象属性</title> <script type="text/javascript"> function catchEvent(){ var eventSrcID = event.srcElement.id; var eventtype = event.type; alert(eventSrcID+"捕获"+eventtype+"事件"); } function getPosition(){ var x = event.clientX; var y = event.clientY; window.status = "鼠标的坐标("+x+","+y+")"; } </script> </head> <body style="font-size:14px"> <img src="snow.jpg" onclick="catchEvent();" onmousemove="getPosition();"/> </body> </html>
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title>表单事件示例</title> 6 <style type="text/css"> 7 div input,select{ 8 width:130px;} 9 </style> 10 <script type="text/javascript"> 11 /*得到焦点*/ 12 function textFocus(obj){ 13 obj.style.background="#33f";} 14 /*失去焦点*/ 15 function textblur(obj){ 16 obj.style.background="#ff5";} 17 /*数据验证*/ 18 function verifySubmit(){ 19 if(document.getElementById("name").value==""){ 20 alert("姓名不能为空"); 21 document.getElementById("name").focus(); 22 return false; 23 } 24 if(document.getElementById("pwd").value==""){ 25 alert("密码不能为空"); 26 document.getElementById("pwd").focus(); 27 return false; 28 } 29 if(document.getElementById("sex").value==""){ 30 alert("请选择性别"); 31 document.getElementById("sex").focus(); 32 return false; 33 } 34 if(document.getElementById("email").value==""){ 35 alert("请填写email"); 36 document.getElementById("email").focus(); 37 return false; 38 } 39 return true; 40 } 41 </script> 42 </head> 43 <body style="font-size:14px"> 44 <form name="form" onsubmit="return verifySubmit()"> 45 <div> 46 <table bordercolor="#33FFFF"> 47 <tr> 48 <td>姓 名:</td> 49 <td><input type="text" id="name" onfocus="textFocus(this)" onblur="textblur(this)"/></td> 50 </tr> 51 <tr> 52 <td>密 码:</td> 53 <td><input type="password" id="pwd" onfocus="textFocus(this)" onblur="textblur(this)"/></td> 54 </tr> 55 <td>性 别:</td> 56 <td> 57 <select id="sex"> 58 <option value="">--------请选择--------</option> 59 <option value="M">男</option> 60 <option value="F">女</option> 61 </select></td> 62 </tr> 63 <tr> 64 <td>邮 箱:</td> 65 <td><input type="text" id="email" onfocus="textFocus(this)" onblur="textblur(this)"/></td> 66 </tr> 67 </tr> 68 <tr> 69 <td align="right"></td> 70 <td align="center"><input type="submit" value="提 交"/><input type="reset" value="重 置"/></td> 71 </tr> 72 </table> 73 </div> 74 </form> 75 </body> 76 </html>
| isNaN() | 检查某个值是否是数字 |
| parseFloat() | 解析字符串并返回一个浮点数 |
| ecodeURI | 将字符串编码为URI |
| decodeURI | 解码某编码的URI |
| unecape() | 对escap()编码的字符串进行解码 |
| escap() | 对字符串进行编码 |
| parseInt() | 解析字符串并返回整数 |
| eval() | 将字符串当做表达式执行 |