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javascript 常用校验代码 2
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請參看:http://hw1287789687.iteye.com/blog/2124945
(1)判斷是否是數字
Java代碼??
????com.whuang.hsj.isInteger=function(int22){??????if(!int22?||?int22==undefined){??????????return?false;??????}??????if(?int22.match(/^[\d\\.]+$/i)){???????return?true;????}else{??????return?false;????}??};?? ?應用:
Js代碼??
var?qrcodeSizeObj=com.whuang.hsj.$$id('qrcodeSize');??????var?qrcodeSizeint=qrcodeSizeObj.value;??????if(!com.whuang.hsj.isHasValue(qrcodeSizeint)){??????????qrcodeSizeObj.focus();??????????alert('請輸入像素大小.');??????????return?;??????}??????var?isDigit=com.whuang.hsj.isInteger(qrcodeSizeint);??????if(!isDigit){??????????alert('請輸入數字[100-1000]');??????????return;??????}?? ?
(2)文本框只能輸入數字
Java代碼??
<input?type="text"?id="qrcodeSize"?οnkeyup="onlyNumberKeyUp(event)"?>像素?? ?這樣,文本框就只能輸入數字了,如果輸入其他字符,比如字母,就會自動刪除.
onlyNumberKeyUp實現:
Js代碼??
?????onlyNumberKeyUp=function(event){??????var?obj=event.srcElement?event.srcElement:event.target;??????var?pattern?=?/[^\d\.\/]/ig;??????if(pattern.test(obj.value))?{??????????var?i=getCursortPosition(event);??????????obj.value=obj.value.replace(pattern,'');??????????setCaretPosition(event,i);??????}??};?? ?
(3)判斷輸入框是否為空
Js代碼??
???????com.whuang.hsj.isHasValue?=?function(input)?{??????if?(typeof?input?==?"number"?&&?input?==?"0")?{??????????return?true;??????}??????if(!input)??????{??????????return?false;??????}??????if(input==""||input==undefined||com.whuang.hsj.isWholeWhitespace(input)){??????????return?false;??????}??????return?true;??};?????????com.whuang.hsj.isWholeWhitespace?=?function(inputString)?{??????if?(typeof?inputString?==?"object")?{??????????return?inputString;??????}??????var?bootInit?=?true;??????if?(inputString?==?""?||?inputString?==?undefined)?{??????????return?false;??????}??????for?(?var?i?=?0;?i?<?inputString.length;?i++)?{??????????var?c?=?inputString.charAt(i);??????????if?(!com.whuang.hsj.isWhitespace(c))?{??????????????bootInit?=?false;??????????????break;??????????}??????}??????return?bootInit;??};??com.whuang.hsj.isWhitespace?=?function(input)?{??????var?whitespace?=?"?\t\n\r";??????for?(?var?i?=?0;?i?<?input.length;?i++)?{??????????var?c?=?input.charAt(i);??????????if?(whitespace.indexOf(c)?>=?0)?{??????????????return?true;??????????}??????}??????return?false;??};?? ?應用:
Js代碼??
var?qrcodeSizeObj=com.whuang.hsj.$$id('qrcodeSize');??????var?qrcodeSizeint=qrcodeSizeObj.value;??????if(!com.whuang.hsj.isHasValue(qrcodeSizeint)){??????????qrcodeSizeObj.focus();??????????alert('請輸入像素大小.');??????????return?;??????}?? ?
?
(4)js動態添加組件(控件)
Js代碼??
var?buttonTd=com.whuang.hsj.$$id("buttonTd");??????????var?newInput?=document.createElement("input");??????????newInput.type="button";???????????newInput.name="input1";??????????newInput.value="修改密碼";??newInput.className='class2';??????????buttonTd.appendChild(newInput);?? ?說明:newInput.className?是用于指定樣式
請參考:http://hw1287789687.iteye.com/blog/2124945
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