js验证表单大全优质资料(可以直接使用，可编辑优质资料，欢迎下载）js验证表单大全(转)2007年05月11日星期五12:47js验证表单大全1.长度限制<script>functiontest(){if(document.a.b.value.length>50){alert("不能超过50个字符！");document.a.b.focus();returnfalse;}}</script><formname=aonsubmit="returntest()"><textareaname="b"cols="40"wrap="VIRTUAL"rows="6"></textarea><inputtype="submit"name="Submit"value="check"></form>2.只能是汉字<inputonkeyup="value="/oblog/value.replace(/[^\u4E00-\u9FA5]/g,'')">3."只能是英文<scriptlanguage=javascript>functiononlyEng(){if(!(event.keyCode>=65&&event.keyCode<=90))event.returnvalue=false;}</script><inputonkeydown="onlyEng();">4.只能是数字<scriptlanguage=javascript>functiononlyNum(){if(!((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode>=96&&event.keyCode<=105)))//考虑小键盘上的数字键event.returnvalue=false;}</script><inputonkeydown="onlyNum();">或者<inputtype="text"onkeypress="if(event.keyCode<45||event.keyCode>57)event.returnValue=false;"/>或者:<inputonkeyup="if(event.keyCode!=37&&event.keyCode!=39)value=value.replace(/\D/g,'');"onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/\D/g,''))">5.只能是英文字符和数字<inputonkeyup="value="/oblog/value.replace(/[\W]/g,"'')"onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))">6.验证油箱格式<SCRIPTLANGUAGE=javascriptRUNAT=Server>functionisEmail(strEmail){if(strEmail.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/)!=-1)returntrue;elsealert("oh");}</SCRIPT><inputtype=textonblur=isEmail(this.value)>7.屏蔽关键字(这里屏蔽***和****)<scriptlanguage="javascript1.2">functiontest(){if((a.b.value.indexOf("***")==0)||(a.b.value.indexOf("****")==0)){alert(":)");a.b.focus();returnfalse;}}</script><formname=aonsubmit="returntest()"><inputtype=textname=b><inputtype="submit"name="Submit"value="check"></form>8.两次输入密码是否相同<FORMMETHOD=POSTACTION=""><inputtype="password"id="input1"><inputtype="password"id="input2"><inputtype="button"value="test"onclic